Add files from ESR's dev directory that weren't under version control

svn path=/trunk/; revision=3881

1 files changed, 1330 insertions, 0 deletions

diff --git a/RFC/lan-mail-protocols b/RFC/lan-mail-protocols
new file mode 100644
index 00000000..13e984ee
--- /dev/null
+++ b/RFC/lan-mail-protocols
@@ -0,0 +1,1330 @@
+
+     SERVING DESKTOP COMPUTERS USING A CENTRAL MAIL SERVER ON AN INTERNET
+                                       
+   
+     _________________________________________________________________
+   
+   Author
+          John Wobus, jmwobus@syr.edu (corrections welcome)
+          
+   Date
+          2/4/1997
+          
+   This file
+          http://web.syr.edu/~jmwobus/comfaqs/lan-mail-protocols.html
+          
+   Other LAN Info
+          http://web.syr.edu/~jmwobus/lans/
+          
+   
+     _________________________________________________________________
+   
+Contents
+
+     * Introduction
+     * List of Protocols and RFCs
+     * Other Sources of Information
+     * Capabilities of Well-known mail clients
+     * List of Implementations
+     * Some other packages for desktop systems
+     * Key and Other Issues
+       
+   
+     _________________________________________________________________
+   
+Introduction
+
+   
+   
+   There are advantages to having a central server receive the mail
+   destined to desktop computers and having the desktop computer collect
+   the mail from the server on demand:
+     * Your desktop computer may be down quite a bit and less network
+       bandwidth and less of the processing resources of the sending
+       computer are used if the computer receiving your mail is ready to
+       receive.
+     * Some people use more than one desktop computer to read mail.
+     * A desktop computer may not have the resources to store all the
+       mail you receive.
+     * It can make your e-mail address more like other users'.
+       
+   
+   
+   The easiest way to "implement" this is to run the central mail server
+   like any multi-user system: let people sign on to it and use some mail
+   utility. Then desktop computer users can use "terminal sessions" to
+   sign on to the central mail server and read their mail (e.g. with Unix
+   "pine"). This has the disadvantage of making the desktop computer
+   users learn and use the central mail server's procedures.
+   
+   SMTP, the "internet" mail protocol used to deliver mail between
+   multi-user systems only supports mail transfer initiated by the sender
+   to actually, it has a method to initiate reception, but the method
+   didn't catch on and is not used). Other protocols have been devised to
+   allow a desktop computer to request transfer of mail, thus able to
+   make use of a central server. These include the published variants of
+   POP, IMAP, and DMSP.
+   
+  POP, POP2, POP3
+  
+   
+   
+   These are rather minimal and are designed to be so. The three are
+   similar but not enough alike to be interoperable. They are basically
+   designed to identify the user by username and password, to transfer
+   the mail from server to desktop computer and to delete the mail
+   transferred. It is assumed that SMTP will be used to send mail.
+   Messages can be retrieved individually, but the only information you
+   can get about a message without transferring it is its length in
+   bytes-- useful for desktop computers with limited storage.
+   
+   POP3 has a number of optional extensions including Xtnd Xmit which
+   allows clients to send mail through the POP3 session rather than using
+   SMTP. Another extension is APOP which allows RSA MD5 encryption of
+   passwords passed over the network.
+   
+   POP3 is now by far the most-used variant of POP, but POP2 may still be
+   used at a few sites. POP3 has a couple of optional extensions: one to
+   avoid sending passwords, and one to aid in reading bulletin boards.
+   
+  IMAP2, IMAP2BIS, IMAP3, IMAP4, IMAP4REV1
+  
+   
+   
+   The IMAP family is similar to the POP family, but also gives clients a
+   way to do string searches through mail that still resides on the
+   server. This is designed to allow the desktop computer to be more
+   selective as to which mail will be transferred. The POP protocols, on
+   the other hand, are designed for simpler server software.
+   
+   IMAP2 is used quite a bit. IMAP3 is an incompatible offshoot that has
+   not been implemented much. IMAP4 is a relatively recent extension of
+   IMAP2 which makes the servers cognizant of the MIME-structure of a
+   message. IMAP2bis was the original name of IMAP4, which has since been
+   refined, but there are/were some implementations of IMAP2bis that are
+   not IMAP4 compliant. IMAP4 also extends IMAP to have many other
+   features including some of DMSP's. IMAP4rev1 includes a few
+   enhancements to IMAP4.
+   
+  ACAP
+  
+   
+   
+   ACAP (Application Configuration Access Protocol), formerly IMSP
+   (Interactive Mail Support Protocol), is a protocol which is being
+   developed to compliment IMAP4 by offering related e-mail services
+   beyond the scope of IMAP4. It includes the ability to subscribe find &
+   subscribe to bulletin boards, mailboxes, and to find and search
+   address books.
+   
+  IMAP VS POP
+  
+   
+   
+   As of this writing (10/96), there are a many more POP than IMAP client
+   implementations and an Internet Service Provider is much more likely
+   to provide POP3 service than IMAP4. But interest in IMAP4 is growing
+   with big-time software houses announcing support. IMAP4 has more
+   features, basically designed to support a model where users store
+   their received mail on a server rather than on their own computer. The
+   big advantage cited for IMAP is that people who "do e-mail" from
+   different computers at different times have the same access to their
+   message store from any of the client-computers they use. The cost of
+   this model (aside from issues such as the complexity and the
+   availability of implementations) is in running a server with
+   sufficient space for the clients' message stores. With personal
+   computer disks now often above a gigabyte (presumeably growing to 10s
+   of gigabytes over the next few years) and multimedia messaging in our
+   future, people storing e-mail on their own hard disk will have a lot
+   of space and ways to use it. A central store serving 10-20 users will
+   not be overly difficult, but one for 1,000 or 10,000 users will be
+   very large (terabytes?) if it is to offer comparable space. The
+   question comes down to the tradeoff between the advantage to users who
+   computer-hop against the costs of managing the large amount of central
+   store. See also online document imap.vs.pop.html (reference below) and
+   section below "Issue of Remote Access".
+   
+  DMSP
+  
+   
+   
+   Also know as PCMAIL. Desktop computers can use this protocol to both
+   send and receive mail. The system is designed around the idea that
+   each user can own more than one workstation; however, the system
+   doesn't seem to handle the idea of a "public workstation" very well.
+   The desktop computers are assumed to hold state information about the
+   mail, a directory so to speak, and when the desktop computer is
+   connected to the server, this directory is updated to "reality". Note:
+   DMSP never gained the following of IMAP or POP and I've heard the
+   software is no longer available.
+   
+  WHO USES THESE PROTOCOLS?
+  
+   
+   
+   These protocols were designed and implemented mostly by
+   Internet-connected universities with some participation by other
+   Internet-connected research institutions. They were certainly devised
+   to handle the type of electronic mail that universities must do. A
+   typical site has probably 10 to 10,000 desktop computers and has an
+   Internet connection and also runs Unix, giving them the Unix sysadmin
+   expertise that makes running a Unix-based server attractive. Most of
+   the servers listed here run under Unix though some run under other
+   large systems and as time goes on, we are seeing more servers that run
+   on PCs and Macintoshes.
+   
+   A more recent use of these protocols has been by Internet Service
+   Providers and their customers. Internet Service Providers require a
+   way to offer e-mail services to however many customers they provide,
+   to customers who are connected to the network only part of the time.
+   Like a campus application, they may have 10 or 10,000 customers to
+   serve. These protocols offer a distinct advantage over SMTP for such
+   purposes and form an attractive complementary e-mail service for WWW
+   users.
+   
+  DISADVANTAGES
+  
+   
+   
+   There are a number of disadvantages associated with the use of these
+   protocols:
+     * since these have long been no more than a small part of the e-mail
+       market, software using these methods is often incompatible with
+       other useful and/or well-known software. A couple of examples are:
+          + Use of mail-enabled applications on desktop computers (there
+            is no fundamental reason that mail software using these
+            protocols can't provide the API used by mail-enabled
+            applications, but in general this hasn't come about yet)
+          + Use of the usual Unix mail readers & the Unix .forward files.
+     * since the server is holding mail for the person, the person can
+       use the server for storage. This leaves the potential for all the
+       disk-space problems inherent in shared disks: people hogging
+       disk-space or forgetting to clean up, etc.
+     * sizing the server: a perennial question people ask is "How big a
+       machine do I need to serve my campus (or department, or
+       whatever)". Naturally no one can give a straight answer because it
+       depends upon so many factors.
+       
+  ISSUE OF REMOTE ACCESS
+  
+   
+   
+   Modern commercial e-mail packages typically have features designed to
+   assist in remote access of ones e-mail. Features include:
+     * ability to download mail through a modem
+     * ability to synchronize two different systems which you are using
+       to read your e-mail by plugging them together.
+       
+   
+   
+   Any method of reading e-mail using PCs or Macintoshes can be used
+   remotely via remote control (the "PCanywhere(tm)" method, e.g. by
+   dialing up your own office PC/Macintosh and using one of the several
+   kinds of software that allow you to control your PC/Macintosh over the
+   phone). Also, any LAN-based method can be used by using one of the
+   several methods of providing the same protocol support over dialup
+   lines as are on LANs (SLIP or PPP for the above-mentioned,
+   TCP/IP-based protocols, ARA for Appletalk-based protocols, etc, and
+   sometimes using two different protocols, one incapsulated in the
+   other) under the constraint that any operations that use the network
+   will be much slower. Also, POP3 is sometime used directly over modems
+   (for example, Eudora can be used in this manner).
+   
+   The ideal protocol for remote access would not penalize the user for
+   the much slower communications speed (usually slower by a factor of
+   100: note that a lot of LAN-based software was written without regard
+   to minimizing the necessary communication, thus is really hurt by such
+   slow speeds), yet would allow the same software to run both remotely
+   and locally, with a wonderful user interface. It would also not be
+   overly expensive in communications equipment or services. This is a
+   difficult set of objectives and the above-three protocols can achieve
+   some of them for some users, but what they actually achieve depends a
+   lot on the user's pattern of e-mail usage. If a user reads just a
+   small amount of mail, then we would not worry about the length of time
+   necessary to download it remotely with POP3, but if the person
+   receives a lot of mail, but just wants to read a small amount of it at
+   home, then with IMAP2, they could pick and choose what to read,
+   eliminating some download time. If someone is paying for the telephone
+   line time (possibly the user if it is a long distance call; in any
+   case, the institution pays a monthly fee for each line it offers,
+   which is dependent upon how many users it is serving, how often they
+   call, and how long their calls are) then IMAP2's natural method of
+   usage which requires the phone call to remain while a user is reading,
+   poking around, sending, and rearranging mail can be much more costly
+   than using POP3 if one call is used to quickly download all the mail
+   and another later call is used to send any replies. Thus with POP3 a
+   user might have two 1 minute calls before and after a 30 minute e-mail
+   session instead of keeping the call for 30 minutes with IMAP2, and
+   each phone line the institution offers could be serving 15 times as
+   many such users who would each pay a lot less in long-distance phone
+   bills. Note that with the advent of multimedia mail (see MIME below)
+   whose messages can be very large, it is possible that downloading even
+   one message that you end up not reading remotely could ruin such a
+   nice-sounding scenario.
+   
+   Note that with the growth of Internet Service Providers, remote access
+   is becoming the normal way for many people to do their e-mail, and
+   offering such services is one of the major growth areas for POP and
+   IMAP.
+   
+  MIME
+  
+   
+   
+   MIME (Multipurpose Internet Mail Extensions) is a relatively new
+   Internet standard for the format for messages with multiple parts, and
+   with non-ASCII data. Any client that can import or export files can
+   use MIME in a clumsy way if you have a program to create and/or decode
+   a MIME message. Some clients have built-in features to do this.
+   Client-server mail protocols generally only deal with entire messages,
+   and can retrieve MIME messages as well as any other messages since
+   MIME was carefully designed to be transparent to existing mail
+   systems. However, IMAP4 has features to allow retrieval of individual
+   parts of MIME-encoded messages. The chart below lists whether a
+   package has MIME support. Servers for protocols that don't offer any
+   special MIME features are marked na for Not Applicable since they need
+   do nothing for users to use MIME. All IMAP4 servers can also do this,
+   but the chart lists whether they include explicit MIME support.
+   
+  APPROACHES NOT COVERED BY THIS MEMO
+     * Proprietary protocols
+     * file sharing
+     * APIs
+     * X.400.
+       
+   
+   
+   Vendors can invent their own protocols similar to those listed above,
+   and some have.
+   
+   LAN e-mail can also be implemented using file sharing, e.g. using NFS
+   to allow separate Unix workstations to share the same mail spool area
+   just as if it were mail being stored on one system, or using Novell's
+   SMF (Simple Message Format) in a Novell file server. If the
+   applications are written so that they are careful to lock files
+   correctly, then this works. An advantage is that any network file
+   protocol can be used and the e-mail application can be somewhat
+   independent of the file protocol. For example, Unix systems could use
+   either AFS or NFS. Pegasus is a PC & Mac application that uses Novell
+   file service to do something similar. Specifications for client-server
+   interaction consist of the file service protocol along with the server
+   directory structures & conventions used for storing e-mail.
+   
+   A very popular approach with commercial vendors is the use of APIs.
+   The client talks to the server using an API (Applications Programming
+   Interface), i.e., a set of subroutine/procedure library call
+   definitions for a library providing subroutines/procedures to send,
+   receive, and manipulate e-mail. With the use of any remote procedure
+   call mechanism, the client can be located on a different computer from
+   the server. This allows some mixing and matching of RPC mechanisms,
+   underlying protocol stacks and APIs: e.g., a vendor defines an API,
+   and it can be run over IPX or TCP/IP, in each case over the protocol
+   stack's RPC mechanism. There are a number of APIs now being pushed by
+   vendors: MAPI (Microsoft); VIM (Lotus); AOCE (Apple). These API's have
+   been the basis for numerous mail-enabled applications: e.g. a word
+   processor that allows you to send or receive documents through e-mail
+   simply uses one of these APIs allowing it to communicate with any
+   server supporting the same API. Specifications for client-server
+   interaction consist of the protocol stack up to the RPC protocol, then
+   the API itself.
+   
+   Note that though the API approach in combination with remote procedure
+   calls allows one to implement client-server e-mail without the use of
+   the protocols covered by this document (IMAP, POP, etc), that there is
+   no theoretical reason why such APIs can't be used in an IMAP or POP
+   environment. The necessary software would be a "driver" or piece of
+   "middleware" that provides the APIs calls to mail-enabled applications
+   and uses POP, IMAP, or whatever over a LAN to reach a server. The
+   advantages/disadvantages of such an approach as compared to the use of
+   RPCs is open to debate. UniPalm's Mail-IT is an example of client
+   software that provides MAPI within the client and uses POP3 to access
+   the server.
+   
+   X.400 is the message transport defined for use between
+   telecommunications vendors and customers by the international
+   consortium of national standards bodies known as ISO. It roughly
+   corresponds to TCP/IP's SMTP and RFC822 header format. A consortium of
+   X.400 vendors (XAPIA) have developed an API for X.400 applications
+   called CMC.
+   
+  LDAP
+  
+   
+   
+   LDAP is a protocol (the Lightweight Directory Access Protocol) being
+   incorporated in some clients as an Internet way for the client to get
+   information about e-mail addresses from a server, i.e. to give you the
+   capability to type in someone's name and have the mail client software
+   retrieve the address from a server-based directory. LDAP also has
+   other uses. There are plans to incorporate LDAP clients into some IMAP
+   and POP clients. LDAP is essentially an Internet-based, simplified
+   X.500-like protocol and one of the original intentions of its creators
+   was to be gatewayed to X.500, thus giving relatively simple Internet
+   clients access to X.500 servers. Both LDAP and X.500 provide a method
+   for naming, retrieving, and searching fields in a directory, but do
+   not define the field-names or what is supposed to go in the fields.
+   Thus server/client interoperability requires further conventions.
+   
+  JAVA
+  
+   
+   
+   Java is a programming language currently (1996) touted as a tool for
+   web-based applications. It can affect the use of LAN protocols in a
+   number of ways: first of all, POP or IMAP clients can be written in
+   Java, using its cross-platform development capabilities to create
+   version for a number of platforms. Second, clients could be written as
+   "Applets", i.e. applications designed to be downloaded into web
+   browsers such as Netscape from a server. With such a design, a user
+   would only need access to a web browser to see their e-mail, e.g. drop
+   into a library and see your e-mail from one of its Internet-browser
+   kyosks. Applets are not normally allowed to access the
+   client-machine's disk files (which would result in too much risk when
+   browsing the Internet from the kind of people who develop computer
+   viruses), so such an application fits a little better into the IMAP
+   model (server storage of e-mail folders) than the POP model (client
+   storage of e-mail folders). Thirdly, Applets enable more practical use
+   of e-mail clients that use non-standard protocols rather than POP or
+   IMAP; interoperability is achieved because the server itself
+   distributes a compatible client applet right when the user accesses
+   the server.
+     _________________________________________________________________
+   
+List of Protocols and RFCs
+
+   
+   
+   Note: for up-to-date information on the RFCs, get an index from an RFC
+   repository. For up-to-date information on the state of each RFC as to
+   the Internet Standards, see the most recent RFC called "Internet
+   Official Protocol Standards".
+
+Name:      Simple Mail Transfer Protocol
+Nickname:  SMTP
+Document:  RFC 821 (Postel, August 1982)
+TCP-port:  25
+Status:    Internet standard (STD 10)
+
+Name:      Post Office Protocol, Version 2
+Nickname:  POP2
+Document:  RFC 937 (Butler et al, February 1985)
+TCP-port:  109
+Status:    Functionally replaced by incompatible POP3 but still used some
+
+Name:      Post Office Protocol, Version 3
+Nickname:  POP3
+Document:  RFC 1939 (Myers & Rose, May 1996)
+TCP-port:  110 (109 also often used)
+Status:    In use, standards track
+Sites:     UC Irvine, MIT
+
+Name       Post Office Protocol, Version 3 Authentication command
+Nickname:  POP3 AUTH
+Document:  RFC1734 (Myers, December 1994)
+
+Name:      Post Office Protocol, Version 3 Extended Service Offerings
+Nickname:  POP3 XTND
+Document:  RFC 1082 (Rose, November 1988)
+
+Name:      Distributed Mail Service Protocol
+Nickname:  DMSP, Pcmail
+Document:  RFC 1056 (Lambert, June 1988)
+TCP-port:  158
+Status:    Used very little
+Sites:     MIT
+
+Name:      Interactive Mail Access Protocol, Version 2
+Nickname:  IMAP2
+Document:  RFC 1176 (Crispin, August 1990)
+TCP-port:  143
+Status:    In use, being replaced by upward-compatible IMAP4
+Sites:     Stanford, U Washington
+
+Name:      Interactive Mail Access Protocol, Version 2bis
+Nickname:  IMAP2bis
+TCP-port:  143
+Status:    Experimental, but in use, being replaced by upward-compatible IMAP4
+
+Name:      Interactive Mail Access Protocol, Version 3
+Nickname:  IMAP3
+Document:  RFC 1203 (Rice, February 1991)
+TCP-port:  220
+Status:    Historical, not used
+Sites:     Stanford
+
+Name:      Internet Message Access Protocol, Version 4
+Nickname:  IMAP4
+Document:  RFC 1730 (Crispin, December 1994)
+TCP-port:  143
+Status:    Implementations exist, being replaced by revised version IMAP4rev1
+Sites:     U Washington
+Related:   RFC 1731 (Myers, December 1994),
+           RFC 1732 (Crispin, December 1994),
+           RFC 1733 (Crispin, December 1994)
+
+Name:      Internet Message Access Protocol, Version 4rev1
+Nickname:  IMAP4rev1
+Document:  RFC 2060 (Crispin, December 1996)
+TCP-port:  143
+Status:    Being implemented, Standards track
+Sites:     U Washington
+Related:   RFC 2061 (Crispin, December 1996),
+           RFC 2062 (Crispin, December 1996)
+
+Name:      Interactive Mail Support Protocol
+Nickname:  IMSP
+Document:  Draft RFC: ? (Myers, June 1995)
+TCP Port:  406
+Status:    Experimental, renamed ACAP
+Sites:     Carnegie Mellon
+
+Name:      Application Configuratino Access Protocol
+Nickname:  ACAP
+Document:  Draft RFC: ? (Myers, June 1996)
+Status:    ?
+Sites:     Carnegie Mellon
+
+   
+   
+   Note: The "I" in IMAP used to stand for "Interactive". Now it stands
+   for "Internet" and the "M" stands for "Message" rather than "Mail".
+   Also, Internet drafts are available at ds.internic.net, munnari.oz.au,
+   and nic.nordu.net in directory internet-drafts. IMAP2bis is
+   essentially an early version of IMAP4.
+     _________________________________________________________________
+   
+Other Sources of Information
+
+   My own info
+          http://web.syr.edu/~jmwobus/lans/#imappop
+          http://web.syr.edu/~jmwobus/internet/
+          
+   The IMAP Connection web site
+          
+        http://www.imap.org
+                Main page
+                
+        http://www.imap.org/products.html
+                List of IMAP implementations
+                
+        http://www.imap.org/imap.vs.pop.brief.html
+                Outlines differences between IMAP and POP.
+                
+        http://www.imap.org/imap.vs.pop.html
+                Same, with more detail.
+                
+        http://www.imap.org/biblio.html
+                Bibliography of IMAP Documents.
+                
+   Information from University of Washington
+          http://www.washington.edu/imap/
+          
+   By anonymous ftp from ftp.cac.washington.edu
+          mail/* (miscellaneous information)
+          
+   Information from andrew2.andrew.cmu.edu
+          
+        http://andrew2.andrew.cmu.edu/cyrus/email/clients-IMAP.html
+                List of IMAP clients
+                
+        http://andrew2.andrew.cmu.edu/cyrus/acap/acap.html
+                The ACAP Home Page
+                
+   Mailing lists:
+          pop@jhunix.hcf.jhu.edu
+          imap@cac.washington.edu
+          CW-EMAIL@EARNCC.EARN.NET
+          
+   By anonymous ftp from rtfm.mit.edu
+          This memo
+          comp.os.msdos.mail-news FAQ Memo
+          Mini FAQ on client-server mail protocols (similar to this memo
+          but shorter and more practical:
+          ftp://rtfm.mit.edu/pub/usenet/news.answers/mail/mailclient-fa
+          q)
+          
+   Consortium
+          "The IMAP Consortium" (Getting under way as of March 1995).
+          
+   Page on MAPI API
+          http://www.wp.com/davidb/emapi.html
+          
+   
+     _________________________________________________________________
+   
+Capabilities of Well-known mail clients
+
+   
+   
+   This section covers what I've been able to find out so far about the
+   well-known mail clients' ability to retrieve mail from a POP or IMAP
+   server.
+
+Client                       POP3           IMAP          MIME
+------                       ----           ----          ----
+Apple PowerMail client          ?              ?             ?
+BeyondMail                    yes        planned-          yes
+CE QuickMail client       planned=       planned=          yes
+Claris Emailer                yes              ?           yes
+DaVinci eMAIL client          yes*             ?           yes*
+Lotus cc:Mail Client           no             no            no
+Lotus Notes mail client        no             no             ?
+Microsoft Mail client          no             no            no
+Microsoft Exchange client     yes+            no           yes&
+Netscape                      yes        planned%          yes
+
+Notes:
+(-) Announced early 1996: target delivery: 4th quarter 1996.
+(=) CE plans to rename the successor to their current client
+    QuickMail LAN, while introducing both a free and a commercial
+    POP3 client, then upgrade the commercial POP3 client to also
+    support IMAP.
+(*) DaVinci SMTP eMAIL: I'm not sure if this is different from
+    the normal DaVinci client.
+(+) Requires Internet Mail Client for Exhange, downloadable from
+    http://www.windows.microsoft.com or included in "Microsoft Plus".
+(&) qp/base64
+(%) Planned for Netscape 4.0
+
+
+
+   
+     _________________________________________________________________
+   
+List of Implementations
+
+
+
+Prot   Computer   Implementation      End  MIME Source
+------ ---------- ------------------- ---- ---- -------------------------------
+DMSP   PC         pc-epsilon (3.1)    clnt ?    allspice.lcs.mit.edu
+DMSP   PC         pc-netmail (3.1)    clnt ?    allspice.lcs.mit.edu
+DMSP   PC         pc-reader           clnt ?    allspice.lcs.mit.edu
+DMSP   Unix       Pcmail 3.1 reposit. srvr na   allspice.lcs.mit.edu
+DMSP   Unix/EMACS Pcmail 4.2          clnt ?    allspice.lcs.mit.edu
+DMSP   PC         PC/TCP 2.3          clnt ?    FTP Software 8/4/94
+DMSP   OS/2       PC/TCP              clnt ?    FTP Software
+DMSP   OS/2       TCP/2               clnt ?    Essex Systems
+DMSP   OS/2       TCP/2 SERVER PACK   srvr na   Essex Systems
+DMSP   OS/2       TCP/2 ADV CLIENT    clnt ?    Essex Systems
+IMAP1  MacOS      MacMS 2.2.1 (obs)   clnt no   sumex-aim.stanford.edu* 7/13/95
+IMAP24 MacOS      Mailstrom 1.04      clnt no   sumex-aim.stanford.edu* 11/7/93
+IMAP24 MacOS      Mailstrom 1.05      clnt no   ftp-camis.stanford.edu 5/21/96
+IMAP24 MacOS      Mailstrom 2(beta)   clnt yes  Tree Star Inc. 12/18/96
+IMAP?  MacOS      Mailstrom           clnt ?    lindy.stanford.edu 9/22/95
+IMAP?  MacOS      Mulberry (beta)     clnt no   mulberry@dial.pipex.com 7/30/96
+IMAP?  MacOS      Mulberry 1.1        clnt ?    CyDaSoft 12/19/96
+IMAPb4 Mac/OT     SIMEON 4.1          clnt yes  ESYS Corp www.esys.ca 8/5/96
+IMAPb4 MacOS      SIMEON 4.1          clnt yes  ESYS Corp www.esys.ca 8/5/96
+IMAPb4 MS-WIN     SIMEON 4.1          clnt yes  ESYS Corp www.esys.ca 8/5/96
+IMAPb4 WIN32      SIMEON 4.1          clnt yes  ESYS Corp www.esys.ca 8/5/96
+IMAPb4 Unix/Motif SIMEON 4.1          clnt yes  ESYS Corp www.esys.ca 8/5/96
+IMAP4  ?          SIMEON SERVER       srvr ?    ESYS Corp www.esys.ca 8/1/96
+IMAP2  MacOS      PathWay             clnt no   The Wollongong Group 2/25/94
+IMAP2  Unix/X     PathWay             clnt no   The Wollongong Group 2/25/94
+POP3   MacOS      PathWay             clnt no   The Wollongong Group 2/25/94
+POP3   Unix/X     PathWay             clnt no   The Wollongong Group 2/25/94
+POP3   OS/2       ? (in testing)      srvr no   kf5mg@computek.net 11/28/95
+POP2   MacOS      MacPOP 1.5          clnt ?    ? 10/24/94
+POP2   MS-DOS     PC POP 2.1          clnt ?    ? 10/24/94
+POP3   MacOS      TCP/Connect II      clnt ?    InterCon Systems Corp
+POP3   MS-WIN     TCP/Connect II f W  clnt yes  InterCon Systems Corp 7/8/94
+POP3   NeXT       EasyMail            clnt yes  ftp.cac.washington.edu 11/7/93
+IMAP2  NeXT       MailManager         srvr yes  ftp.cac.washington.edu 11/7/93
+IMAP2  TOPS20     MAPSER              srvr na   ? 11/7/93
+IMAP2  Unix       imap kit            srvr na   ftp.cac.washington.edu 2/1/94
+POP23  Unix       imap kit            srvr na   ftp.cac.washington.edu 2/1/94
+POP23  Unix       IPOP                srvr na   ftp.cac.washington.edu 2/23/96
+IMAP4  Unix       imap4 kit (alpha)   srvr na   ftp.cac.washington.edu 5/31/95
+IMAP24 Unix       Pine 3.90           clnt yes  ftp.cac.washington.edu 9/23/94
+IMAP24 Unix       Pine 3.91           clnt yes  ftp.cac.washington.edu 10/14/94
+IMAP2b Unix       Pine 3.95           clnt yes  ftp.cac.washington.edu 7/30/96
+IMAP24 Unix       Pine 4.0 (future)   clnt yes  ftp.cac.washington.edu 7/30/96
+IMAP24 MS-DOSl+   PC-Pine 3.90        clnt yes  ftp.cac.washington.edu 9/23/94
+IMAP24 MS-DOSl+   PC-Pine 3.91        clnt yes  ftp.cac.washington.edu 10/14/94
+POP23r Unix       popclient x.x (rep) clnt no   Renamed 'fetchmail' 10/7/96
+IMAPb4 Unix       popclient x.x (rep) clnt no   Renamed 'fetchmail' 10/7/96
+POP23r Unix       fetchmail 2.0       clnt no   www.ccil.org/~esr 11/19/96
+IMAPb4 Unix       fetchmail 2.0       clnt no   www.ccil.org/~esr 11/19/96
+POP23r Unix       fetchmail 2.2       clnt no   www.ccil.org/~esr 12/10/96
+IMAPb4 Unix       fetchmail 2.2       clnt no   www.ccil.org/~esr 12/10/96
+POP23r Unix       fetchmail 2.3       clnt no   www.ccil.org/~esr 12/18/96
+POP3k  Unix       fetchmail 2.3       clnt no   www.ccil.org/~esr 12/18/96
+IMAPb4 Unix       fetchmail 2.3       clnt no   www.ccil.org/~esr 12/18/96
+POP23r Unix       fetchmail 2.6       clnt no   www.ccil.org/~esr 12/18/96
+POP3k  Unix       fetchmail 2.6       clnt no   www.ccil.org/~esr 12/18/96
+IMAPb4 Unix       fetchmail 2.6       clnt no   www.ccil.org/~esr 12/18/96
+POP23r Unix       fetchmail 3.3       clnt no   www.ccil.org/~esr 2/4/97
+POP3k  Unix       fetchmail 3.3       clnt no   www.ccil.org/~esr 2/4/97
+IMAPb4 Unix       fetchmail 3.3       clnt no   www.ccil.org/~esr 2/4/97
+POP?   Unix       gwpop               clnt ?    ftp.pasteur.fr 2/9/96
+POP?   Unix       popc                clnt ?    ftp.imag.fr 2/9/96
+POP?   Unix       popmail             clnt ?    ftp.cic.net 2/9/96
+POP?   Unix       movemail            clnt ?    GNU 2/9/96
+IMAP2  VMS        Pine 3.88 port      clnt yes  vms.huji.ac.il 4/12/94
+IMAP?  VMS        Pine in PMDF 4.3    clnt ?    Innosoft 4/1/94
+IMAP2  VMS        ImapD port          srvr yes  vms.huji.ac.il 4/12/94
+POP3u  Win3/95/NT Navigator 2.x       clnt yes  Netscape 7/29/96
+IMAP?  Windows?   pcMail (future)     clnt ?    OzMail 3/19/96
+POP?   Solaris    Navigator 3.0b4(fut)clnt ?    Netscape 6/25/96
+IMAP4  ?          Navigator 4.0 (fut) clnt yes  Netscape 7/30/96
+IMAP4  MacOS      Navigator 4.0 (fut) clnt yes  Netscape 12/18/96
+POP3   Macintosh6 Eudora 1.3.1        clnt no   ftp.qualcomm.com 7/14/94
+POP3   Mac7/PM7   Eudora 1.5.3        clnt yes  ftp.qualcomm.com 8/4/95
+POP3mr Macintosh7 Eudora 2.0.2        clnt yes  Qualcomm 5/10/94
+POP3mr Mac7/PM7   Eudora 2.0.3        clnt yes  Qualcomm 9/13/94
+POP3mrkMac7/PM7   Eudora 2.1          clnt yes  Qualcomm 9/13/94
+POP3mrkMac7/PM7   Eudora 2.1.1        clnt yes  Qualcomm 8/4/95
+POP3mrkMac7/PM7   Eudora 2.1.2        clnt yes  Qualcomm 8/4/95
+POP3mrkMac7/PM7   Eudora 2.1.3        clnt yes  Qualcomm 8/4/95
+POP3   MS-WINw    Eudora 1.4.4        clnt yes  ftp.qualcomm.com 6/23/95
+POP3   MS-WINw    Eudora 1.5.2b1      clnt yes  ftp.qualcomm.com 8/4/95
+POP3   MS-WINw    Eudora 2.0.3        clnt yes  Qualcomm 9/13/94
+POP3   MS-WINw    Eudora 2.1.1        clnt yes  Qualcomm 8/4/95
+POP3   WIN32      Eudora Pro 2.2b8    clnt yes  Qualcomm 12/5/95
+POP3   WIN3/95/NT Eudora Pro ?        clnt yes  Qualcomm 7/29/96
+POP3   Mac        Eudora Pro 3.0      clnt yes  Qualcomm 8/14/96
+POP3   OS/2       PMMail 11           clnt yes  hobbes.nmsu.edu 6/2/95
+POP3   OS/2       POP3D 12            srvr yes  hobbes.nmsu.edu 6/2/95
+POP3   OS/2       POP3D 14A           srvr yes  hobbes.nmsu.edu 9/12/95
+POP3   OS/2       POP3D 14B           srvr yes  hobbes.nmsu.edu 4/5/96
+POP?   OS/2       popsrv99.zip        srvr ?    hobbes.nmsu.edu 2/15/96
+POP3r  OS/2       popsrv10.zip        srvr na   ftp-os2.mnsu.edu 3/15/96
+POP3   MS-WIN     Mi'Mail             clnt yes  http://www.irisoft.be 6/30/95
+
+IMAP2b Unix/XM    ML 1.3.1            clnt yes  ftp-camis.stanford.edu 7/13/95
+IMAP24 Unix/XM    ML 2.0 (future)     clnt yes  Stanford 7/13/95
+IMAP1  Unix       imapd 3.2 (obs)     srvr na   ftp-camis.stanford.edu 7/13/95
+IMAP2b Unix       imapd 3.4/UW        srvr ?    ftp.cac.washington.edu 12/13/94
+IMAP2b Unix       imapd 3.5/UW        srvr ?    ftp.cac.washington.edu 4/25/95
+IMAP2b Unix       imapd 3.6.BETA      srvr ?    ftp.cac.washington.edu 4/25/95
+IMAP2b Unix       imapd 4.0/UW (fut)  srvr ?    U Wash 4/25/95
+IMAP?  Unix       imapd 8.0(124)      srvr ?    U Wash 1/31/97
+IMAP?  Unix       imapd 9.0(161)      srvr ?    U Wash 1/31/97
+IMAP4  ?          imap-4              srvr yes  ftp.cac.washington.edu 10/25/96
+POP3u  ?          imap-4              srvr na   ftp.cac.washington.edu 10/25/96
+IMAP4  ?          imap-4.1 ALPHA      srvr yes  ftp.cac.washington.edu 10/25/96
+POP3u  ?          imap-4.1 ALPHA      srvr na   ftp.cac.washington.edu 10/25/96
+IMAP?  Unix/X     Palm (in dev)       clnt ?    UMiami 11/7/93
+IMAP?  Unix/X     Cyrus (dev on hold) clnt yes  CMU 10/4/94
+IMAP   Unix       Cyrus 1.4           srvr yes  ftp.andrew.cmu.edu 12/1/95
+POP3   Unix       Cyrus 1.4           srvr na   ftp.andrew.cmu.edu 12/1/95
+KPOP   Unix       Cyrus 1.4           srvr na   ftp.andrew.cmu.edu 12/1/95
+POP3u  Unix       Cyrus ?             srvr na   3/12/96
+IMAP41 Unix       Cyrus 1.5           srvr yes  ftp.andrew.cmu.edu 1/3/97
+POP3k  Unix       Cyrus 1.5           srvr na   ftp.andrew.cmu.edu 1/3/97
+KPOP   Unix       Cyrus 1.5           srvr na   ftp.andrew.cmu.edu 1/3/97
+IMAP4  ?          Futr Andrew Msg Sys ?    ?    Carnegie-Mellon 9/20/94
+IMAP?  Xrx Lsp Mc Yes-Way             clnt yes  Stanford U 11/7/93
+IMAP2b MacOS      ECSMail             clnt yes  ESYS Corp www.esys.ca 12/16/96
+IMAP2b MS-WINw    ECSMail             clnt yes  ESYS Corp www.esys.ca 12/16/96
+IMAP2  Unix/XM    ECSMail Motif       clnt yes  ESYS Corp www.esys.ca 12/16/96
+IMAP2b Solaris    ECSMail             clnt yes  ESYS Corp www.esys.ca 12/16/96
+IMAP2  MS-DOS     ECSMail DOS         clnt yes  ESYS Corp www.esys.ca 12/16/96
+IMAP?  NT         ECSMail             clnt yes  ESYS Corp www.esys.ca 12/16/96
+IMAP?  OS/2       ECSMail OS/2        clnt yes  ESYS Corp www.esys.ca 12/16/96
+IMAP?  Unix       UMAIL               clnt no   umail@umail.umd.edu 11/7/93
+IMAP?  Unix       MS                  clnt no   ftp.cac.washington.edu 11/7/93
+IMAP2  MS-WIN     PathWay             clnt no   The Wollongong Group 2/25/94
+POP3   MS-WIN     PathWay             clnt no   The Wollongong Group 2/25/94
+POP?   MS-WIN     PathWay Access 3.0  clnt ?    The Wollongong Group 8/4/94
+POP3   NT         sendmail/POP3 (bet) srvr na   www.metainfo.com 9/15/95
+POP3   NT         sendmail/POP3       srvr na   emwac.ed.ac.uk 12/5/95 (www.emw
+ac.ed.ac.uk)
+IMAP4  NT         sendmail/POP3 (fut) srvr ?    emwac.ed.ac.uk 5/21/96 (www.emw
+ac.ed.ac.uk)
+IMAP2  Amiga      Pine 3.8x (in dev)  clnt yes  UWashington 11/7/93
+POP    MacOS      POPmail 1.7         clnt ?    boombox.micro.umn.edu 9/1/95
+POP23  MacOS      POPmail 2.09b       clnt ?    boombox.micro.umn.edu 9/1/95
+IMAP2  MacOS      POPmail 2.09b       clnt ?    boombox.micro.umn.edu 9/1/95
+POP23  MacOS      POPmail 2.2         clnt ?    boombox.micro.umn.edu 9/1/95
+IMAP2  MacOS      POPmail 2.2         clnt ?    boombox.micro.umn.edu 9/1/95
+POP3   MacOS      POPmail/Lab         clnt ?    boombox.micro.umn.edu 9/1/95
+POP    NeXT OS    BlitzMail           srvr na   ftp.dartmouth.edu 10/23/95
+POP    DEC OSF/1  BlitzMail           srvr na   ftp.dartmouth.edu 10/23/95
+POP    AIX        BlitzMail (in dev)  srvr na   ftp.dartmouth.edu 10/23/95
+POP3   MS-WINw5   POPmail/Lab         clnt ?    boombox.micro.umn.edu 9/1/95
+POP3   MacOS      Emailer 1.1         clnt yes  Claris 7/29/96
+POP3   MacOS      OfficeMail          srvr na   Claris 6/6/96
+IMAP2b Unix       imapperl-0.6        clnt ?    dnpap.et.tudelft.nl 2/6/96
+POP2   MacOS      MailStop 1.1.3      srvr na   boombox.micro.umn.edu 1/18/94
+POP3r  MacOS      MailShare 1.0(beta) srvr na   glenn.anderson@stonebow.otago.a
+c.nz 8/16/94
+POP3r  MacOS      MailShare 1.0fc6    srvr na   ftp.qualcomm.com 8/4/95
+POP3r  MacOS      AIMS 1.0            srvr na   Apple 10/27/95
+POP3r  MacOS      AIMS 1.1            srvr na   Apple 5/21/96 (www.cybertech.ap
+ple.com)
+POP3r  MacOS      AIMS 1.1.1          srvr na   Apple 10/17/96
+POP3r  MacOS      AIMS 2.0 (fut: '97) srvr ?    Apple 10/17/96
+POP3r  MacOS      AIMS 2.1 (fut)      srvr ?    Apple 10/17/96
+IMAP   MacOS      AIMS 2.1 (fut)      srvr ?    Apple 10/17/96
+POP3   MacOS      POPGate 1.1         gway ?    Stalker 3/25/96 (www.stalker.co
+m)
+IMAP?  MacOS      MailDrop 1.1        clnt ?    ackmo.baylor.edu 3/22/96
+IMAP2? MacOS      MailDrop 1.2d6a     clnt ?    ackmo.baylor.edu 3/22/96
+IMAP?  MacOS      MailDrop 2 (dev)    clnt ?    Baylor 1/19/96
+POP2   MS-DOS     LifeLine Mail 2.0   clnt ?    SunSelect 12/7/93
+POP23  MS-DOS     SelectMail 2.1      clnt ?    SunSelect 1/25/94
+POP2   MS-DOSk    ?                   srvr na   ucsd.edu
+POP2   MS-DOSk    net091b             srvr na   boombox.micro.umn.edu 12/3/93
+POP3   MS-DOSk    pop3nos v1.86       srvr na   boombox.micro.umn.edu 12/3/93
+POP2   MS-DOSp    POPMail 3.2.2       clnt ?    boombox.micro.umn.edu 9/1/95
+IMAP?  MS-DOSp    POPMail/PC 3.2.2    clnt ?    boombox.micro.umn.edu 1/11/94
+POP2   MS-DOSp    POPMail 3.2.3 beta2 clnt ?    boombox.micro.umn.edu 9/1/95
+IMAP?  MS-DOSp    POPMail 3.2.3 beta2 clnt ?    boombox.micro.umn.edu 9/1/95
+POP3   MS-DOSk    pop3serv            srvr na   biochemistry.crwu.edu
+POP3   MS-DOSk    nos11c-a.exe        srvr na   biochemistry.bioc.cwru.edu 9/16
+/94
+POP2   MS-DOS     MD/DOS-IP           clnt ?    U Maryland
+POP2   MS-DOS     PC/TCP              clnt ?    FTP Software
+POP2   OS/2       PC/TCP for OS/2     clnt ?    FTP Software 11/2/93
+POP23  MS-WIN     BW-Connect          clnt no   Beame & Whiteside 8/4/94
+POP3   MS-WIN     Air Series 2.06     clnt no   Spry 7/7/94
+IMAP?  MS-WIN     Air Mail            ?    ?    AIR Co. Ltd 9/20/94
+IMAP?  MS-WIN     EMBLA               ?    ?    ICL ProSystems 9/20/94
+IMAP4  ?          Intrnt Msging Srvr  srvr ?    ICL TeamWare 9/8/1
+POP3   ?          Intrnt Msging Srvr  srvr ?    ICL TeamWare 9/8/1
+POP23  MS-DOSp    Minuet 1.0b18a(beta)clnt no   minuet.micro.umn.edu 9/1/95
+POP?   MS-WINls   TCPMail             clnt ?    Pinesoft (pinesoft@net.com)
+POP2   Unix       U Minn popd 1.5c    srvr na   boombox.micro.umn.edu 11/19/93
+POP2   Unix/AIX   aix_new_popd        srvr na   boombox.micro.umn.edu 9/1/95
+POP2   Unix/HP9k  hp9000_popd         srvr na   boombox.micro.umn.edu 9/1/95
+POP23  MS-WINw    POPmail             clnt ?    boombox.micro.umn.edu 9/1/95
+IMAP2  MS-WINw    POPmail             clnt ?    boombox.micro.umn.edu 9/1/95
+POP2   Unix       USC-ISI popd        srvr na   ? 10/24/94
+POP2   Unix       imapd/ipop2d 3.4    srvr na   ftp.cac.washington.edu 12/13/94
+POP3   Unix/curs  Z-Mail Lite 3.2     clnt yes  NetManage 8/23/96 www.netmanage
+.com
+POP3   Unix/line  Z-Mail Lite 3.2     clnt yes  NetManage 8/23/96 www.netmanage
+.com
+POP3   Unix/XM    Z-Mail Motif 3.2.1  clnt yes  NetManage 8/23/96 www.netmanage
+.com
+POP3   WIN3/95/NT Z-Mail 4.0.1        clnt yes  NetManage 8/23/96 www.netmanage
+.com
+POP3   MacOS      Z-Mail 3.3.1        clnt yes  NetManage 8/23/96 www.netmanage
+.com
+IMAP4  WIN3/95/NT Z-Mail Pro          clnt yes  NetManage 8/23/96 www.netmanage
+.com
+IMAP4  WIN3/95/NT Z-Mail Pro 6.0      clnt yes  NetManage 1/31/97 www.netmanage
+.com
+IMAP?  MacOS      Z-Mail ?            clnt yes  NetManage 5/21/96
+POP?   Unix       zync ?              clnt ?    NCD 9/23/94 (www.ncd.com)
+POP23k UnixX      xmh                 clnt ?    ftp.x.org 2/15/94
+POP23k UnixX      exmh                clnt yes  ? 8/8/95
+POP23k UnixX      dxmail/mh           clnt ?    DEC
+POP?   Unix       ucbmail clone       clnt ?    rtfm.mit.edu 12/16/94
+POP?   Unix       pop-perl-1.0        clnt ?    sunsite.unc.edu 9/13/94
+POP?   Unix/XO    SXMail 0.9.74a (b)  clnt ?    ftp.uni-stuttgart.de 10/12/95
+POP2   VM         FAL                 srvr na   IBM
+POP2   MS-WIN     IBM TCP/IP for DOS  clnt no   IBM 7/7/94
+POP2   VM         ?                   srvr na   Texas Tech University
+POP?   VM         ?POPD               srvr na   vmd.cso.uiuc.edu 2/4/94
+POP3   VM         vmpop3.200          srvr na   uriacc.uri.edu 1/10/95
+POP3   MUSIC/SP   POPD 1.0            srvr na   McGill Univ. Sys. Inc. 01/11/95
+POP2   OS/2       TCP/2 SERVER PACK   srvr na   Essex Systems
+POP2   VMS        MultiNet            srvr na   TGV, Inc. 07/26/95
+POP2   HP3000/MPE NetMail/3000        srvr na   3K Associates
+POP3   ?          NetMail/3000        srvr na   3K Associates
+POP3k  MacOS      Eudora 1.3a8k       clnt ?    ftp.brown.edu 8/19/94
+POP3   MacOS      MacPOP (Berkeley)   clnt ?    ftp.cc.berkeley.edu
+POP3k  MacOS      TechMail 2.0        clnt ?    net-dist.mit.edu
+POP3   MacOS      MacMH               clnt ?    jessica.stanford.edu/info
+POP3   MacOS      VersaTerm Link      clnt ?    Synergy Software 10/8/93
+POP3   MacOS      LeeMail 2.0.2 (shw) clnt ?    chs.cusd.claremont.edu 10/12/93
+POP3   Mac7pro    Mail*Link Internet  clnt yes  StarNine Technologies 2/18/94
+POP3t  Unix       popper-1.7          srvr na   ftp.cc.berkeley.edu 10/15/93
+POP3k  Unix       popper-1.7k         srvr na   ftp.brown.edu 10/19/94
+POP3k  Unix       hacked ucbmail      clnt no   UCSC 6/29/95
+POP3k  Unix       hacked pine         clnt yes  UCSC 6/29/95
+POP3   Unix       popper-1.831        srvr na   ftp.cc.berkeley.edu 11/3/93
+POP3   Solaris2.X popper-1.831/uore   srvr na   ftp.uoregon.edu 10/19/93
+POP3   Solaris2.X popper-1.9          srvr na   ftp.chalmers.se 7/26/94
+POP3   Unix       popperQC3           srvr na   ftp.qualcomm.com 8/4/95
+POP3   Unix       qpopper 2.1.3-r5    srvr na   ftp.qualcomm.com 8/4/95
+POP3   Unix       qpopper 2.1.4-r1    srvr na   ftp.qualcomm.com 8/4/95
+POP3u  Unix       qpopper 2.1.4-r3    srvr na   ftp.qualcomm.com 2/26/96
+POP3u  Unix       qpopper 2.1.4-r4    srvr na   QualComm 5/16/95
+POP3r  Unix       Vers of qpopper     srvr na   QualComm 1/26/96
+POP3u  Unix       qpopper 2.2 beta    srvr na   Qualcomm 2/26/96
+POP?   Unix       zpop                srvr na   NCD 9/1/95
+POP3   Unix       popper.rs2          srvr na   ftp.qualcomm.com 8/4/95
+POP3   Unix       perl popper         srvr na   ftp.xensei.com/users/ccrlphr 9/
+1/95
+POP23k Unix       mh-6.8 (UCI RandMH) both yes  ftp.ics.uci.edu 8/30/94
+POP23krUnix       mh-6.8.3 (UCI RndMH)both yes  ftp.ics.uci.edu 9/27/94
+POP23  Unix/EMACS RMAIL               clnt no   ? 8/2/95
+POP23  Unix/EMACS vm                  clnt no   ftp.uu.net 8/2/95
+POP3   Linux      miniclient          clnt ?    sunsite.unc.edu 8/30/94
+POP3   Unix       imapd/ipop3d 3.4    srvr na   ftp.cac.washington.edu 12/13/94
+POP3   Unix       pop3d 1.004         srvr na   ftp.ucdavis.edu 12/3/93
+POP2   Unix       pop2d 1.001         srvr na   ftp.ucdavis.edu 12/3/93
+POP3   Unix       mush 7.2.5          clnt ?    ? 12/16/94
+POP23k Unix       popmaild            srvr na   ftp.wu-wien.ac.at 4/5/95
+IMAP   AIX        imap server         srvr ?    ftp.wu-wien.ac.at 4/5/95
+POP3   MacOS/AOCE MailConnect         clnt yes  ? 7/5/95
+POP3t  MS-DOSnpo  PC/TCP              clnt ?    FTP Software
+POP3   OS/2       PC/TCP for OS/2     clnt ?    FTP Software 11/2/93
+POP3   MS-DOS     TechMail(future)    clnt ?    ?
+POP3   MS-WINl    TechMail for Wind.  clnt ?    net-dist.mit.edu 2/25/94
+POP3   OS/2l      TechMail for Wind.  clnt ?    net-dist.mit.edu 2/25/94
+POP3   MS-DOSp    NUPop 1.03          clnt no   ftp.acns.nwu.edu 11/5/93
+POP3   MS-DOSp    NUPop 2.02          clnt no   ftp.acns.nwu.edu 1/18/94
+POP3   MS-DOSp    NUPop 2.10 (alpha)  clnt yes  ftp.acns.nwu.edu 6/10/94
+POP23  MS-WINw    Trumpet             clnt no   ftp.psychol.utas.edu.au 7/7/94
+POP3   MS-WIN     Pceudora            clnt ?    ftp.qualcomm.com 9/24/93
+POP3   MS-WINw    WinPmail 2.0b4      clnt ?    risc.ua.edu 6/6/95
+POP3   MS-DOSp    POPgate (Pmail gw)  clnt ?    risc.ua.edu 4/1/94
+POP3   MS-DOSl    PMPOP (Pmail gw)    clnt ?    risc.ua.edu 4/1/94
+POP3x  MS-WIN     WinQVT (2.1)        clnt ?    QPC Software (shareware) 7/12/9
+4
+POP3   MS-WINp    wnqvtnet 3.0        clnt ?    ftp.cica.indiana.edu
+POP3   MS-WINp    wnqvtnet 3.9        clnt ?    ftp.cica.indiana.edu 2/1/94
+POP3   MS-WIN     Open Systems Mail   clnt ?    Pine Software
+POP3   MS-WIN?    IMAIL               both ?    Ipswitch 7/12/94
+POP3   NT         Ipswitch            srvr ?    Ipswitch 5/24/96
+POP3   VMS        IUPOP3 v1.7         srvr na   ftp.indiana.edu 7/25/94
+POP3   VMS        IUPOP3 v1.7-CMU-TEK srvr na   ftp.indiana.edu 7/25/94
+POP3   VMS        IUPOP3 v1.8-1       srvr na   ftp.indiana.edu 7/25/94
+POP3   MS-DOS     POP3 0.9            clnt na   ftp.indiana.edu 7/25/94
+POP3   VMS        MultiNet            both ?    TGV, Inc. 07/26/95
+POP3   VMS        PMDF 5.1            srvr na   Innosoft 9/24/96 www.innosoft.c
+om
+POP3   Solaris    PMDF 5.1            srvr na   Innosoft 9/24/96 www.innosoft.c
+om
+POP3   DigUNIX    PMDF 5.1            srvr na   Innosoft 9/24/96 www.innosoft.c
+om
+POP3   OpenVMS    PMDF 5.1            srvr na   Innosoft 9/24/96 www.innosoft.c
+om
+IMAP?  VMS        PMDF 5.1            srvr ?    Innosoft 9/24/96 www.innosoft.c
+om
+IMAP?  Solaris    PMDF 5.1            srvr ?    Innosoft 9/24/96 www.innosoft.c
+om
+IMAP?  DigUNIX    PMDF 5.1            srvr ?    Innosoft 9/24/96 www.innosoft.c
+om
+IMAP?  OpenVMS    PMDF 5.1            srvr ?    Innosoft 9/24/96 www.innosoft.c
+om
+IMAP?  MS-DOS     PMDF E-mail Interc  clnt ?    Innosoft 3/2/94 www.innosoft.co
+m
+IMAP?  MacOS      PMDF E-mail Interc  clnt ?    Innosoft 3/2/94 www.innosoft.co
+m
+POP?   VMS        PMDF E-mail Interc  ?    ?    Innosoft 6/24/96 www.innosoft.c
+om
+IMAP?  VMS        PMDF E-mail Interc  ?    ?    Innosoft 6/24/96 www.innosoft.c
+om
+POP3r  VMS        PMDF popstore       clnt ?    Innosoft 9/24/96 www.innosoft.c
+om
+IMAP4  SolarisX   Roam (Future)       clnt ?    Sun 9/26/95
+IMAP?  Windows?   Roam (Future)       clnt ?    Sun 3/19/96
+IMAP4  SolarisX   imapd (Future)      clnt ?    Sun 9/26/95
+IMAP4  Solaris    Solstice IMS1.0     srvr yes  SunSoft 10/17/96 http://www.sun
+.com
+POP3   Solaris    Solstice IMS1.0     srvr yes  SunSoft 10/17/96 http://www.sun
+.com
+
+IMAP4  Solaris    Solstice IMS2.0 (f) srvr yes  SunSoft 10/17/96 http://www.sun
+.com
+POP3   Solaris    Solstice IMS2.0 (f) srvr yes  SunSoft 10/17/96 http://www.sun
+.com
+IMAP4  Solaris    Solstice IMC0.9     clnt yes  SunSoft 4/5/96 http://www.sun.c
+om
+IMAP4  Solaris    Solstice IMC? (fut) clnt yes  SunSoft 4/5/96 http://www.sun.c
+om
+IMAP4  MS-WIN3.11 Solstice IMC0.9     clnt yes  SunSoft 4/5/96 http://www.sun.c
+om
+IMAP4  MS-WIN3.11 Solstice IMC? (fut) clnt yes  SunSoft 4/5/96 http://www.sun.c
+om
+IMAP4  MS-WIN95   Solstice IMC0.9     clnt yes  SunSoft 4/5/96 http://www.sun.c
+om
+IMAP4  MS-WIN95   Solstice IMC? (fut) clnt yes  SunSoft 4/5/96 http://www.sun.c
+om
+IMAP4  NT         Solstice IMC0.9     clnt yes  SunSoft 4/5/96 http://www.sun.c
+om
+IMAP4  NT         Solstice IMC? (fut) clnt yes  SunSoft 4/5/96 http://www.sun.c
+om
+IMAP4  Win95      SOlstice 2.0        clnt ?    SunSoft 1/31/97
+POP3   OS/2       TCP/2 SERVER PACK   srvr na   Essex Systems
+POP3   OS/2       TCP/2 ADV CLIENT    clnt ?    Essex Systems
+POP?   MS-DOS     UCDmail             clnt ?    ftp.ucdavis.edu 10/24/94
+POP?   MS-DOS     PC POP              clnt ?    ?Bill Schweickert/Sterling Fed
+POP23  MS-WINnpo  Super-TCP for W e.0 clnt yes  Frontier Technologies 6/10/94
+POP?   MS-WINnpo  Super-TCP for W e.0 srvr yes  Frontier Technologies 7/12/94
+POP3   WIN3/95/NT SuperHghwy Access 2 clnt yes  Frontier Technologies 7/29/96
+POP?   MS-WINw    Windows ELM         clnt ?    lister.cc.ic.ac.uk 7/12/94
+IMAP?  ?          ELM patches         clnt ?    www.math.fu-berlin.de/~guckes/e
+lm/patches 7/16/96
+POP23  MS-DOSni   ChameleonNFS        both ?    NetManage 8/4/94
+POP23  MS-DOSni   Chameleon beta      clnt yes  NetManage
+POP23  MS-WINw    Internet Chameleon  clnt yes  NetManage 7/12/94
+POP23  NT         Chameleon V5.0 f NT both ?    NetManage 11/28/95
+IMAP?  Windows?   Chameleon (future)  clnt ?    NetManage 3/19/96
+POP?   MacOS      MEWS                clnt ?    ?
+POP?   MacOS      byupopmail          clnt ?    ?
+POP?   VM         ?                   srvr na   TTUVM1
+POP3   MacOS      HyperMail           ?    ?    ?
+?      OS/2       lamailpop           ?    ?    ftp-so2.cdrom.com
+POP?   OS/2       Popclient           clnt yes  ? 1/19/96
+POP?   OS/2       Emacs 19.xx         clnt yes  ? 1/19/96
+POP3   MS-DOSs    pcelm               clnt ?    lister.cc.ic.ac.uk 1/25/94
+POP3   MS-WINs    winelm              clnt ?    lister.cc.ic.ac.uk 1/25/94
+POP3   NetWare    Mercury 1.11        srvr na   risc.ua.edu 2/4/94
+POP3   NetWare34  Mercury 1.2.1       srvr na   risc.ua.edu 3/29/96
+POP3   NetWare34  Mercury 1.3         srvr na   risc.ua.edu 8/2/96
+POP3   MS-WINw    IMail               srvr na   Ipswitch 7/15/94
+POP3   MS-Windows Pegasus/Win 2.3     clnt ?    risc.ua.edu 6/6/96
+POP3   MS-Windows Pegasus/Win 2.2(r3) clnt ?    risc.ua.edu 6/6/96
+POP3   MS-Windows Pegasus/Win 2.0(r1) clnt ?    risc.ua.edu 6/6/96
+POP3   MS-DOS     Pegasus/DOS 3.2(r2) clnt ?    risc.ua.edu 6/6/96
+POP3   MacOS      Pegasus/MAC 2.1.2   clnt ?    risc.ua.edu 6/6/96
+POP23  MS-WINw    Mail-IT 2           clnt yes  mail-it@unipalm.co.uk 7/12/94
+POP23  Unix       Mail-IT 2           clnt yes  mail-it@unipalm.co.uk 9/9/94
+POP23  Unix       servers w Mail-IT   srvr na   mail-it@unipalm.co.uk 12/16/94
+POP?   MS-WIN     RFD Mail 1.22       clnt ?    ftp.std.com 7/19/94
+POP?   MS-WIN     RFD Mail 1.23       clnt ?    ftp.std.com 9/16/94
+POP3   MS-WINw    ws_gmail            srvr na   buckshot.usma.edu 9/16/94
+POP3   MS-WINw    IMAIL               srvr na   Ipswitch 9/16/94
+POP3   MS-WINw    Pronto Mail 2.01    clnt yes  Commtouch 4/24/96 (www.commtouc
+h.com)
+IMAP   MS-WINw    Pronto              clnt yes  Commtouch 9/5/95
+IMAP4  ?          Pronto97            clnt yes  CommTouch 1/7/97 (www.commtouch
+.com)
+POP3   ?          Pronto97            clnt yes  CommTouch 1/7/97 (www.commtouch
+.com)
+POP23  MS-WINw    Turnpike            clnt yes  Turnpike Ltd, http:www.turnpike
+.com 8/11/95
+POP3   MS-WIN     WinSmtp             srvr na   Seattle Labs, http://wildside.k
+wnet.on.ca/winsmtp.html 11/3/95
+POP3r  WIN95      SLmail95            srvr na   http://www.seattlelab.com/ 5/14
+/96
+POP3r  NT         SLmailNT            srvr na   http://www.seattlelab.com/ 3/29
+/96
+POP3   ?          VA Professional     clnt yes  Ashmount 4/30/96 http://www.asn
+mount.com
+POP3   ?          VA Workgroup        clnt yes  Ashmount 4/30/96 http://www.asn
+mount.com
+POP3   NT         post.office         srvr na   Software.com, Inc. 12/11/95 (ww
+w.software.com)
+POP3   Solaris    post.office         srvr na   Software.com, Inc. 12/11/95 (ww
+w.software.com)
+POP?   MS-?       Exchange            clnt ?    Microsoft 10/24/95
+POP3   MS-?       Exchange Server (f) srvr yes  Microsoft 9/11/96
+IMAP4  MS-?       Exch Server (maybe) srvr ?    Microsoft 6/21/96
+POP3   MS-?       Exchange Server 5.0 srvr ?    Microsoft 1/14/97
+POP3   MS-?       Inter. Mail & News  clnt yes  Microsoft 6/4/96 (www.microsoft
+.com)
+POP3   MS-?       Inter. Mail Service gway ?    Microsoft 6/4/96 (www.microsoft
+.com)
+POP3u  NT         Exchpop(?) 1.0      gway yes  http://www.sts.co.il/pop3.htm 6
+/14/96
+POP3   MacOS      Powertalk           ?    ?    ? 11/7/95
+IMAP2  MS-WIN     Siren Mail          clnt yes  Siren Software 12/28/95
+IMAP?  Windows?   Siren Mail 3.0      clnt yes  Siren Software 3/19/96
+POP3   MS-WIN     Siren Mail          clnt yes  Siren Software 12/28/95
+IMAP2  WIN95      Siren Mail          clnt yes  Siren Software 12/28/95
+POP3   WIN95      Siren Mail          clnt yes  Siren Software 12/28/95
+IMAP2  NTclient   Siren Mail          clnt yes  Siren Software 12/28/95
+POP3   NTclient   Siren Mail          clnt yes  Siren Software 12/28/95
+?      Unix       Siren Mail          srvr ?    Siren Software 12/28/95
+IMAP2  ?          Siren Mail Server   srvr ?    Siren Software 8/1/96
+POP3   ?          Siren Mail Server   srvr ?    Siren Software 8/1/96
+IMAP4  ?          Siren Mail (future) clnt yes  Siren Software 12/28/95
+IMAP?  MacOS      Siren Mail (future) clnt yes  Siren Software 1/21/96
+IMAP?  WIN95      Siren Mail (beta)   clnt yes  Siren Software 7/30/96
+POP3   MacOS      NetAlly             srvr na   Delphic (www.delphic.com) 11/17
+/95
+POP3   DOSWIN     BeyondMail          clnt yes  Banyan (beyondmail.banyan.com)
+2/6/96
+IMAP4  ?          BeyondMail (future) clnt yes  Banyan (beyondmail.banyan.com)
+9/6/96
+POP?   NT         MailSrv from Res K. srvr na   Microsoft?
+IMAP   WIN?       ?                   clnt ?    Email connection 12/8/95
+POP3   NetWare34  SoftNet WEBserv     srvr na   Puzzle Systems 12/15/95 (info@p
+uzzle.com)
+POP3   NT         Netscape Mail Srvr  srvr na   Netscape 12/18/95 (info@netscap
+e.com)
+POP3   SunOS      Netscape Mail Srvr  srvr na   Netscape 12/18/95 (info@netscap
+e.com)
+POP3   Solaris    Netscape Mail Srvr  srvr na   Netscape 12/18/95 (info@netscap
+e.com)
+IMAP4  NT         Netscape M S 2.0(f) srvr ?    Netscape 6/21/96
+IMAP4  NT         Netscape M S 2.02   srvr ?    Netscape 1/31/97
+POP3   OpenVMS    TCPware Internet Sr srvr na   Process Software 12/20/95 (info
+@process.com)
+POP3   Unix       UMT (beta)          clnt ?    ftp.topaz.kiev.ua 12/29/95 (www
+.topaz.kiev.ua)
+POP3   NetWare 4  LAN WorkGroup 5     ???? na   Novell 1/1/96
+IMAP2  Solaris    MMail               clnt yes  Atelier de Software Ltd. 5/21/9
+6
+IMAP2  MacOS      MMail (planned)     clnt yes  Atelier de Software Ltd. 5/21/9
+6
+POP?   OS/2       Yarn/Souper(?)      clnt ?    ? 1/16/96
+POP3   NT         Sendmail w POP3 1.0 srvr na   MetaInfo 1/19/96 http://www.met
+ainfo.com
+POP3   NT         Sendmail w POP3 1.1 srvr na   MetaInfo 12/4/96 http://www.met
+ainfo.com
+POP3   ?          PopGate             gway na   ftp.esi sys.com 1/19/96
+POP3   OS/2       ? (future)          srvr na   Secant 1/23/96
+?POP3  NT         NT MAIL             ?    ?    http://bhs.com 1/26/96
+POP3   NT         MAILbus Internet    srvr na   Digital 2/20/96 (www.digital.co
+m)
+POP3   DEC UNIX   MAILbus Internet    srvr na   Digital 2/20/96 (www.digital.co
+m)
+POP3r  NT         MAILbus Internet(b) srvr na   Digital 2/20/96 (www.digital.co
+m)
+POP3r  DEC UNIX   MAILbus Internet(b) srvr na   Digital 2/20/96 (www.digital.co
+m)
+POP?   OS/2       lampop(?)           clnt ?    ? 1/26/96
+POP?   NT         NTMail              clnt ?    www.mortimer.com 2/9/96
+POP3   DOSWINMac  OpenMail (future)   clnt ?    HP 3/29/96 http://www.openmail.
+external.hp.com
+IMAP   DOSWINMac  OpenMail (future)   clnt ?    HP 3/29/96 http://www.openmail.
+external.hp.com
+POP3   NetWare4   Connect2SMTP        srvr ?    Infinite Technologies 3/29/96
+POP3   OS/2       PowerWeb Server++   srvr na   CompuSource 4/16/96 http://www.
+compusource.co.za
+POP3   OS/2       SIDIS/2             srvr na   stargate.rz.fh-offenburg.de 6/4
+/96
+POP3   ?          WIG v2.0            gway ?    http://www.demon.co.uk/ 4/19/96
+POP3   WIN95      Windis32            srvr na   Demon Internet 6/6/96 (www.demo
+n.co.uk)
+POP3   DOSWINMac  DaVinci SMTP eMAIL  clnt yes  On Technology 4/24/96
+POP?   WIN32      Mail OnNet (OnNet32)clnt yes  FTP Software 5/3/96 (www.ftp.co
+m)
+POP?   Unix       xfmail              clnt ?    burka.netvision.net.il 5/110/96
+POP3rutOS/2       POP3s v1.01         srvr ?    www.secant.com 5/14/96
+POP3   Java Aplt  Yamp                clnt ?    www.mcs.net/~faisal/Yamp/yampix
+.html 5/24/96
+POP3   NT         NT Mail             gway ?    www.net-shopper.co.uk 5/31/96
+POP3   WIN?       Mailcall            chkr na   ? 6/11/96
+POP3   WIN?       Mailcheck           chkr na   ? 6/11/96
+POP3   DOS        C2SMTP              srvr na   Infinite Technologies 6/11/96
+POP    MacOS      Quarterdeck v4(fut) clnt yes  Starnine 6/11/96 (www.starnine.
+com)
+POP    MacOS      List Star           ?    ?    Starnine 6/24/96 (www.starnine.
+com)
+POP3   MacOS      Marionet 1.0        srvr na   Allegiant 6/12/96 (www.allegian
+t.com)
+POP3   ?          Mailcoach V1.0      srvr na   http://www.multi.se/ymex/mailco
+ach.htm 6/14/96
+IMAP4  WIN3/NT/95 JetMail             clnt yes  NetManage 7/29/96
+POP3   WIN3/NT/95 JetMail             clnt yes  NetManage 7/29/96
+POP3   NT         Post.Office         srvr na   NetManage 8/22/96 www.netmanage
+.com
+POP3   SunOS      Post.Office         srvr na   NetManage 8/22/96 www.netmanage
+.com
+POP3   Solaris    Post.Office         srvr na   NetManage 8/22/96 www.netmanage
+.com
+POP3   Unix       Z-Pop 1.0           srvr na   NetManage 8/22/96 www.netmanage
+.com
+POP3   AppleShare FutureShare (fut)   srvr na   Apple 6/14/96
+POP?   ?          Applixware          ?    ?    Applix 6/24/96
+POP3   Unix       Mail*Hub            srvr ?    CDC 10/23/96 www.cdc.com
+IMAP4  Unix       Mail*Hub            srvr ?    CDC 10/23/96 www.cdc.com
+POP?   Unix       TkRat               clnt ?    www.dtek.chalmers.se/~maf/ratat
+osk 6/24/96
+IMAP?  Unix       TkRat               clnt ?    www.dtek.chalmers.se/~maf/ratat
+osk 6/24/96
+IMAP?  Unix       Elm                 clnt ?    ? 7/1/96
+POP3   WIN16/32   Virtual Access      clnt yes  www.ashmount.com 8/9/96
+POP3   ?          pop-perl5           clnt ?    ? 7/23/96
+POP3   WIN95      Agent               clnt ?    ? 7/23/96
+POP3   ?          Mail eXtension 1.60 clnt ?    Terckland 7/26/96 (ourworld.com
+puserve.com/homepages/mailx)
+POP3   WIN3/95/NT Emissary Office 1.1 clnt yes  Attachmate 7/29/96
+POP3   WIN3/95    Pronto Mail 2.0     clnt yes  CommTouch 7/29/96
+POP3   ?          gcMail 081b (beta)  clnt ?    www.greencedars.com 8/9/96
+POP3r  Java       shareware Java cls  clnt ?    Koehn Consulting 8/2/96
+POP3   ?          cucipop (future)    srvr na   cuci.nl 8/6/96
+POP3   MacOS      QuickMail Pro       clnt ?    CE Software www.cesoft.com 12/1
+9/96
+POP3   ?          QuickMail Pro (fut) clnt ?    CE Software www.cesoft.com 8/9/
+96
+IMAP?  ?          QuickMail Pro (fut) clnt ?    CE Software www.cesoft.com 8/9/
+96
+POP3   ?          QuickMail POP (fut) clnt ?    CE Software www.cesoft.com 8/9/
+96
+POP3   ?          QM-Internet Gateway ?    ?    CE Software 6/24/96
+POP3   ?          Lotus Notes 4.5 srv srvr ?    Lotus 10/17/97
+POP3   Be         BeMail              clnt ?    www.be.com 11/25/96
+POP3   NT         Metainfo/Intergate  srvr na   ? 11/26/96
+POP3   Java       Novita Mail         clnt ?    Novita Comm 12/10/96
+IMAP?  Java       Novita Mail         clnt ?    Novita Comm 12/10/96
+IMAP?  Windows    Winbox 3.1 Beta 1   clnt ?    ftp.uv.es 12/13/96
+POP?   Windows    Winbox 3.1 Beta 1   clnt ?    ftp.uv.es 12/13/96
+POP3   MacOS      Bluto (future)      clnt yes  Bare Bones www.barebones.com 12
+/18/96
+POP3   WIN95/NT   ExpressIT! 2000     clnt ?    Infinite Technologies www.ihub.
+com 1/14/97
+IMAP   WIN95/NT   ExpressIT! 2000     clnt ?    Infinite Technologies www.ihub.
+com 1/14/97
+------ ---------- ------------------- ---- ---- -------------------------------
+
+   
+     _________________________________________________________________
+   
+Some other packages for desktop systems
+
+
+------ ---------- ------------------- ---- ---- -------------------------------
+?      MS-DOSs    CMM                 peer ?    Cinetic Systems 1/25/94
+?      MS-DOSs    WinMail 1.1a        peer ?    Obsolete
+SMTP   MacOS      LeeMail 1.2.4       peer ?    Shareware, laf@mitre.org
+SMTP   MacOS      LeeMail 2.0.2 (shw) peer ?    chs.cusd.claremont.edu 10/12/93
+SMTP   MS-DOSni   ChameleonNFS        peer ?    NetManage 2/25/94
+SMTP   MS-WINw    ws_gmail            peer ?    buckshot.usma.edu 5/26/94
+uucp   MacOS      FernMail            peer ?    Shareware, dplatt@snulbug.mtvie
+w.ca.us
+prop   MacOS      MacPost             both ?    ftp.lu.se 10/19/93
+uucp   MacOS      Eudora >1.3.1       peer yes  ftp.qualcomm.com 5/10/94
+MAPI   WIN3/95/NT Eudora Pro ?        clnt yes  Qualcomm 7/29/96
+uucp   MacOS      UUPC                peer ?    dplatt@snulbug.mtview.ca.us
+uucp   MacOS      gnuucp              peer ?    jim@fpr.com
+uucp   MS-DOS     waffle              peer ?    ? dell@vox.darkside.com 10/24/9
+4
+uucp   MS-DOS     UUPC                peer ?    ? help@kew.com 10/24/94
+fshare MS-Windows Pegasus/Win 2.3     clnt ?    risc.ua.edu 6/6/96
+fshare MS-Windows Pegasus/Win 2.2(r3) clnt ?    risc.ua.edu 6/6/96
+fshare MS-Windows Pegasus/Win 2.0(r1) clnt ?    risc.ua.edu 6/6/96
+fshare MS-DOS     Pegasus/DOS 3.2(r2) clnt ?    risc.ua.edu 6/6/96
+fshare MacOS      Pegasus/MAC 2.1.2   clnt ?    risc.ua.edu 6/6/96
+fshare MS-Windows Pegasus/Win 2.4.2   clnt ?    risc.ua.edu 8/2/96
+fshare MS-DOS     Pegasus/DOS 3.3.1   clnt ?    risc.ua.edu 8/2/96
+SMTP   MS-DOS     Charon              gway ?    risc.ua.edu 10/15/93
+Waffle MS-WIN     Boxer               clnt ?    ftp.halcyon.com 12/3/93
+?      MS-?       pcelm               clnt ?    simtel 12/3/93
+?      MS-?       elm-pc              clnt ?    lister.cc.ic.ac.uk 12/3/93
+SMTP   MS-WINw    Internt Ex for cc:m gway yes  IMA 1/31/94
+SMTP   Netware    Mercury 1.11        gway ?    risc.ua.edu 2/4/94
+?      MacOS      PowerMail           clnt ?    Apple 2/18/94
+SMTP   OS/2       PC/TCP v1.3         peer ?    FTP Software 2/18/94
+MAPI   MS-DOS?    Microsoft Mail      clnt ?    Microsoft 3/2/94
+?      MacOS      Microsoft Mail      clnt ?    Microsoft 3/15/94
+VIM    DOSWINMac  cc:mail             clnt ?    Lotus 3/15/94
+MHS/G  DOSWINMac  DaVinci eMAIL       clnt ?    On Technology 4/24/96
+P7uucp DOSWINMac  OpenMail            clnt ?    HP 3/2/94
+?      DOSWINMac  WordPerfect Office  clnt ?    WordPerfect Corp. 3/15/94
+?      DOSMac     MailWorks           clnt ?    DEC 3/2/94
+MHS/G  DOSWIN     BeyondMail          clnt yes  Banyan (beyondmail.banyan.com)
+2/6/96
+?      DOSOS/2    Higgins Mail        clnt ?    Enable Software 1/26/95
+?      MacOS      QuickMail 3.6       clnt ?    CE Software 6/6/96
+?      DOS        QuickMail 3.0       clnt ?    CE Software 6/6/96
+?      MS-WIN     QuickMail 3.5       clnt ?    CE Software 6/6/96
+?      MacOS      QuickMail 4.0 (fut) clnt ?    CE Software 6/6/96
+?      ?          QuickMail ?         clnt yes  CE Software 7/15/96
+?      MS-WIN     Team                clnt ?    Futurus 1/26/95
+?      DOSWIN     ExpressIT!          clnt ?    Infinite Technologies 1/26/95
+MAPI   WIN95/NT   ExpressIT! 2000     clnt ?    Infinite Technologies www.ihub.
+com 1/14/97
+MHS    WIN95/NT   ExpressIT! 2000     clnt ?    Infinite Technologies www.ihub.
+com 1/14/97
+VIM    WIN95/NT   ExpressIT! 2000     clnt ?    Infinite Technologies www.ihub.
+com 1/14/97
+?      ?          GroupWise           cnlt ?    Novell 1/26/95
+?      DOSWINMac  Lotus Notes         clnt ?    Lotus 3/15/94
+FCP    MacOS      FirstClass 2.5      clnt no   SoftArc 7/12/94
+FCP    MS-WIN     FirstClass 2.5      clnt no   SoftArc 7/12/94
+FCP    MacOS      FirstClass 2.5      srvr no   SoftArc 7/12/94
+MHS    MacOS      FirstClass/MHS      gway no   SoftArc 7/12/94
+UUCP   MacOS      FirstClass/UUCP     gway no   SoftArc 7/12/94
+MAPI   MS-WINw    Mail-IT 2           clnt yes  mail-it@unipalm.co.uk 7/12/94
+MAPI   ?          ECSmail             clnt ?    ESYS Corp www.esys.ca 12/16/96
+VIM    ?          ECSmail             clnt ?    ESYS Corp www.esys.ca 12/16/96
+MAPI   MS-WIN     SIMEON 4.1          clnt ?    ESYS Corp 222.esys.ca 12/16/96
+MAPI   WIN3/95/NT Z-Mail 4.0.1        clnt yes  NetManage 8/22/96 www.netmanage
+.com
+MAPI   MS-WIN     Air Mail            ?    ?    AIR Co. Ltd 10/7/94
+MAPIs  MS-WIN     Siren Mail          ?    ?    Siren Software 12/28/95
+MAPIs  WIN95      Siren Mail          ?    ?    Siren Software 12/28/95
+MAPIs  NTclient   Siren Mail          ?    ?    Siren Software 12/28/95
+SMTP   MS-WINw    Mail-IT 2           peer yes  mail-it@unipalm.co.uk 7/12/94
+?      MS-WINw    Panda               ?    ?    ftp.cica.indiana.edu 7/12/94
+PSS    MS-Win     pMail 3.0           clnt no   CommTouch 9/27/94
+PSS    MS-DOS     pMail 3.0           clnt no   CommTouch 9/27/94
+PROP   MacOS      BlitzMail           clnt no   ftp.dartmouth.edu 10/23/95
+PROP   NeXT OS    BlitzMail           srvr no   ftp.dartmouth.edu 10/23/95
+PROP   DEC OSF/1  BlitzMail           srvr no   ftp.dartmouth.edu 10/23/95
+PROP   AIX        BlitzMail (in dev)  srvr no   ftp.dartmouth.edu 10/23/95
+PROP   ?          FreeMail            ?    ?    whttp://www.montana.com/freemai
+l 95/12/8
+PROP   MacOS      CommuniGate         both ?    Stalker 5/21/96 (www.stalker.co
+m)
+SMPT   MacOS      SMTPGate            gway ?    Stalker 3/25/96 (www.stalker.co
+m)
+UUCP   MacOS      UUCPGate            gway ?    Stalker 3/25/96 (www.stalker.co
+m)
+?      MacOS      Quarterdeck Mail    both yes  Starnine 6/11/96 (www.starnine.
+com)
+MAPI   WIN3/NT/95 JetMail             clnt yes  NetManage 7/29/96
+------ ---------- ------------------- ---- ---- -------------------------------
+
+   
+     _________________________________________________________________
+   
+Key and Other Issues
+
+
+(a) What are the common extensions to POP3 and which clients/servers
+ support them?
+POP3k - Kerberos
+POP3a - AFS Kerberos
+POP3x - ?
+POP3t - xtnd xmit facility--allows client to send mail through additional
+ POP commands, thus allowing server to verify/log source of mail.
+POP3r - APOP
+POP3m - ?
+POP3u - with UIDL command.
+(b) What DOS protocol stacks are supported?
+MS-DOSm - Lan Manager
+MS-DOSn - NDIS Drivers
+MS-DOSl - Lan Workplace for Dos
+MS-DOSs - Sun PCNFS
+MS-DOSp - Packet Drivers
+MS-DOSo - ODI Drivers
+MS-DOSi - IPXLink
+MS-DOSf - FTP Software PC/TCP
+MS-DOSk - KA9Q I think
+MS-WIN? - similar
+MS-WINw - WinSock compliant
+MS-WIN5 - Windows 95
+WIN3 - Windows 3.x winsock
+WIN3/95/NT - Windows 3.x Winsock, Windows 95 and Windows NT
+WIN3/95 - Windows 3.x Winsock and WIndows 95
+NetWare3 - NetWare 3.x
+NetWare4 - NetWare 4.x
+NetWare34 - NetWare 3.x and 4.x
+(c) Other notes
+IMAP1 - Original IMAP: I've heard that MacMS actually uses a unique
+        dialect of it.  Definitely obselete, unsupported, discouraged.
+IMAP2b - IMAP2bis: name applied to various improved versions of IMAP2.
+ This development effort culminated in IMAP4.
+IMAP24 - IMAP2 or IMAP4
+fshare - uses file sharing.
+IMAPb4 - IMAP2, IMAP2bis, or IMAP4.
+IMAP41 - IMAP4rev1
+MAPI - Microsoft's Messaging API
+MAPIs - Simple MAPI.
+VIM - Lotus's Vendor Independent Messaging API
+CMC - XAPIA's Common Message Calls API
+AOCE - Apple Open Collaborative Environment
+PROP - System-specific proprietary protocol
+FCP - Softarc's proprietary client-server protocol.
+Unix/X - X Windows based
+Unix/XM - Motif based
+Unix/XO - OpenWindows based
+PSS - PROFS Screen Scraper
+sumex-aim.stanford.edu* - almost dead as of 7/13/95, to be replaced by
+ info-mac.org.
+Metamail - a package with which MIME messages can be processed from
+ basically any Unix-based mail client.
+POPGate (Stalker Software) - gateway to/from Stalker's CommuniGate
+ system:  enables both use of POP3 to get software from a POP3 server
+ for use within a CommuniGate community, and to allow POP3 clients to
+ retrieve mail from a CommuniGate server.
+DigUNIX - Digital Unix
+Solaris - Solaris 2.x
+(d) IMAP/MAPI adaptors:
+Wollongong's Pathway Access 7/12/94
+mail-it@unipalm.co.uk's Mail-IT 7/12/94
+(e) IMAP/POP3 adaptors:
+Included with NCD Z-mail 4.0 for Windows 9/14/95
+------ ----------- ------------------- ------- -------------------------------