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cvsmail can be used to add links to the FreeBSD cvsweb interface to your FreeBSD commit mail, for easy viewing of diffs.

Couriergraph is a very simple mail statistics RRDtool frontend for Postfix that produces daily, weekly, monthly and yearly graphs of Courier's POP3, IMAP, POP3s and IMAPs logins.

Cyrus2Dovecot is a full-featured command line tool for converting the e-mails of one or more users from Cyrus format to Dovecot Maildir++ folders. It allows for performing a server transition which is fully transparent to both POP and IMAP users.

This software is supposed to work as a "reference implementation" of the suggested "whoson" internet protocol. The protocol is expected to be employed on "spam relay protected" mail servers to allow traveling customers still send their email via the protected server. For this, a realtime database of "temporarily trusted" IP addresses is maintained by a special daemon program. The database may be filled by, e.g. POP/IMAP servers, and used by SMTP server. Another possible use of the protocol is to have the database filled by RADIUS/TACACS server for all dialup clients, and SMTP server using it to put the user identity into the "Received" header along with the source IP address. The protocol itself is defined in a separate document "whoson.txt".

This is an implementation of DomainKeys draft standard for the Postfix mail transfer agent. DomainKeys is proposed by Yahoo!, Inc. and this is a scheme to sign and verify e-mail messages on a per-domain basis. Protocol and other issues about this draft standard can be found at http://antispam.yahoo.com/domainkeys.

A collection of several self standing plug-in modules that intend to make your procmail experience more fun.

ENMA is a milter program for the domain authentication technologies. It authenticates sender's address with SPF and Sender ID, then labels the result onto the Authentication-Results: field.

esmtp is a user configurable relay-only Mail Transfer Agent (MTA) with a sendmail compatible syntax. It's based on libESMTP supporting the AUTH (including the CRAM-MD5 and NTLM SASL mechanisms) and the StartTLS SMTP extensions. These are the esmtp features: * fully sendmail command line compatible, * supports the AUTH SMTP extension, with the CRAM-MD5 and * NTLM SASL mechanisms, * support the StartTLS SMTP extension, * requires no administration privileges, * individual user configuration, * does not receive mail, expand aliases or manage a queue.

Asmail is a "mail-checker" like xbiff, but with the Afterstep look & feel. It indicates the status of your mailbox. It can be put in the Wharf, execute a program on incoming mail, execute a program upon mouseclick, show animations and more...

Exilog is a tool to centralize and visualize Exim logs across multiple Exim servers with a web front end. It is used in addition to Exim's standard or syslog logging. It does not require changing Exim or its logging style.