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PGPsendmail is a drop-in wrapper for the standard sendmail programme which resides as /usr/sbin/sendmail on most Unix systems. It allows the automatic encryption of outgoing messages by using the recipient's PGP public keys. It does *not* provide for automatic decryption of incoming messages: such a feature would necessarily involve compromising your passphrase. However, it can provide for automatic signing of outgoing messages by using PGPdaemon.

A fast rbl lookup implementation for qmail, typically used as part of .qmail command processing. It has the same function as rblsmtpd, but the messages are checked at local delivery time.

Excerpted from the BLURB file... TkRat is a graphical Mail User Agent (MUA) which handles MIME, POP3 and IMAP4.1. It is mainly written in C, but the user interface is done in Tcl/Tk. The following is a non-exhaustive list of the capabilities: * Multilingual interface (English, Swedish and Italian included) * MIME support: text/plain, image/gif and message/rfc822 including multipart/mixed and multipart/alternate, Quoted-printable and Base64 encoding. * Supports MIME in headers * Composing: (tk's text widget plus many extensions) or an external editor of your choice. * Message database * Virtual folders: mbox, mh, IMAP or POP * Message hold: suspend the composing, continued later * Watcher: When the program is iconified it checks the mailbox * Uses sendmail OR direct SMTP or other MA * Supports Delivery Status Notifications - DSN ESMTP sendmail-8.7 * Supports PGP/MIME and "old-style PGP message receipt"

Phplist is an email announcement delivery system. It is great for newsletters, publicity lists, notifications, and many other uses. Phplist has many features, including: * double opt-in subscription mechanism * scheduling * RSS * list segmentation * click-tracking * attachments * bounce management

Simple, fast, /bin/sh-based filters to use GnuPG with Alpine. In addition to the standard functions of encrypt/decrypt and sign/verify for inline messages, I added pseudo-filters to verify or decrypt messages that were sent using MIME encoding. See the INSTALL file for instructions on how to configure these filters.

tpop3d is yet-another-pop3-server. The intention has been to write a server which is fast, extensible, and secure. tpop3d supports traditional (BSD-format) mailspools and Maildir. It also supports MySQL, perl, and external authentication methods.

qmailanalog is a collection of tools to help you analyze qmail-send's activity record. It supplies statistics to answer a wide variety of questions: * overall: how many messages? recipients? attempts? etc. * ddist: how soon were 50% of the messages delivered? 90%? 95%? 99%? * rxdelay: what's the best order of recipients for mailing lists? * recipients, rhosts: who's getting mail? bytes? messages? attempts? * successes, failures, deferrals: why? how often? how much delay? * senders, suids: messages? bytes? load? recipients? attempts? delay? qmailanalog also includes several tools to focus attention on particular senders, recipients, or messages.

This is POP3Lite, a flexible, RFC 1939 compliant Post Office Protocol 3 daemon. It implements everything mentioned in the RFC (either natively, or via modules), and some other things that are not strictly POP3 related capabilities (such as modules, PAM support, SQL configuration, etc).

the popa3d goals ================ Is a POP3 daemon by Solar Designer. Well, the goals themselves are obvious; they're probably the same for most other POP3 servers as well. It's their priority that differs. For popa3d, the goals are: 1. Security (to the extent that is possible with POP3 at all, of course). 2. Reliability (again, as limited by the mailbox format and the protocol). 3. RFC compliance (slightly relaxed to work with real-world POP3 clients). 4. Performance (limited by the more important goals, above). This port is installed to be run from inetd, which is sufficient for normal usage. However, it is possible to build a stand-alone version, should you need better performance.