Sieve is a programming language that can be used for email filtering. It owes its creation to the CMU Cyrus Project, creators of Cyrus IMAP server.

The language is not tied to any particular operating system or mail architecture. It requires the use of RFC-2822–compliant messages, but otherwise should generalize to other systems that meet these criteria. The current version of Sieve's base specification is outlined in RFC 5228, published in January 2008.

A list of lightweight [versions of] websites without all the bloat. Websites included include no, or very little JavaScript and are smaller than 1MB in size (usually smaller by a significant margin).

A Makefile and set of shell scripts for turning a new OpenBSD box into a mail server with one command.

United States Postal Service APIs. I should be able to plug this into Switchboard.

A bundle of open source cryptographic software for Microsoft Windows with an installer to make it simple to set up. Includes GnuPG, WinPT and GPA (keyring managers), GPGol (a plugin for Outlook 2003), GPGee (a plugin for the Windows Explorer), and a copy of Claws (an e-mail client that uses GnuPG transparently). Also includes handbooks for newbies with crypto.

An utility written in Python that connects to an account on an IMAP server, recursively downloads everything, and stores the messages as mbox files. Useful for migration from system to system.

A public mailing list service that caters specifically to F/OSS projects and Free Culture collaboration. No ads, no censorship, no frills.

How to interactively edit the mail queue of a Postfix server to delete messages, clean up junk, or other stuff. Requires administrative access. Read the whole thing before you do anything.