A simple postfix mail filter ("milter") that converts emails to XMPP messages. The main use-case is converting monitoring system email alerts into XMPP messages. This is useful because email support in monitoring systems is universal, but XMPP support is very spotty. Posts to XMPP MUCs.

Secure your email server with STARTTLS Everywhere! Your email service can be insecure in numerous different ways. The service below performs a quick check of your email server's security configuration, including whether STARTTLS is supported, and whether it may qualify for the STARTTLS Policy List.

An SMTP daemon that sits between the network and your actual SMTP server (it was designed with Postfix in mind but it should be possible to drop in front of other servers, like Qmail). It runs all SMTP traffic through an antivirus scanner (ClamAV by default) before passing it along to the rest of the SMTP server. Designed to be simple and lightweight (written in C instead of Perl).

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.