Fetchmail Feature List

Since 4.0:

The interface and monitor options now work with freeBSD.
Fetchmail now sends RFC1894-conformant bouncemail on SMTP and LMTP errors.
Full support for LMTP according to RFC2033.
True multi-language support using GNU gettext.
Support for use of HESIOD with Kerberos.
The --bsmtp option supports recording fetched mail as a BSMTP batch.
The --limit option can now be used in daemon mode, with oversized-message notifications being mailed to the calling user.
Configurable support for the SDPS extensions in www.demon.net's POP3 service.
There is now an interactive GUI fetchmail configurator, fetchmailconf.
Code is 64-bit clean and Y2K-safe.
Automatically decodes armored 7-bit MIME into 8 bits (this can be suppressed).
You can specify which SMTP error is recognized as a spam block.
Support for Kerberos V authentication.
Support for IMAP-OTP authentication using Craig Metz's patches for UW IMAP.
Support for IPv6 and IPSEC (using Craig Metz's inet6-apps library).
Support for IMAP with RFC1731-conformant GSSAPI authentication.
Fixed and verified support for Cyrus IMAP server, M$ Exchange, and Post Office/NT.
Support for responding with a one-time password when a POP3 server issues an RFC1938-conforming OTP challenge.
Support for Compuserve's RPA authentication protocol for POP3 (not compiled in by default, but configurable).

Support for IMAP RFC 1731 authentication with Kerberos v4.
Support for multiple-folder retrieval in a single session under IMAP.
Following SMTP 571 response to a From line, fetchmail no longer downloads the bodies of spam messages.
Support for a `hunt list' of SMTP hosts.
Support for ESMTP 8BITMIME and SIZE options.
Support for ESMTP ETRN command.
The stripcr & forcecr options to explicitly control carriage-return stripping and LF->CRLF mapping before mail forwarding.

Support for secure use with ssh.
Mailserver passwords can be parsed out of your .netrc file.
When forwarding mail via SMTP, fetchmail respects the 571 "spam filter" response and discards any mail that triggers it.
Transaction and error logging may optionally be done via syslog.
(Linux only) Security option to permit fetchmail to poll a host only when a point-to-point link to a particular IP address is up.
RPOP support (restored; had been removed in 1.