path: root/RFC/lan-mail-protocols

     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
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