Email Security through Procmail (the Procmail Sanitizer) provides methods to sanitize email, removing obvious exploit attempts and disabling the channels through which exploits are delivered. Facilities for detecting and blocking Trojan Horse exploits and worms are also provided.
XFMail is an X11 application for receiving electronic mail. It implements most of its email functionality internally so that it does not depend on a lot of extra packages. It supports POP3, MBOX, IMAP4, sendmail, and SMTP. It has built-in support for interfacing with PGP, GPG, ispell/aspell, faces, LDAP, and esound. It runs on most Unix variants.
Xamime is a commercial development spawned from Inflex, with various components released back to the OpenSource community (ripMIME, alterMIME, OpenTNEF, ripOLE, and FileType). It provides control of email filtering via spam, virus, email size, file name, file type, file contents, sender and/or receiver name, header defects, and numerous other attributes. It comes with a rapid installation process, a WWW administration interface, interface hooks to external SQL engines, spam filters, virus scanners, and custom scripts.
MailStripper Pro is a mail scanner that aims to remove spam and viruses from incoming mail. It recognises and decodes many obfuscation techniques used by spammers and uses several different mechanisms to recognise spam which are immune to Bayes poisoning, and has achieved real-world success of over 99.8%. It is MTA-independent and does not implant itself into your mail server. Instead, it functions as a proxy, allowing the MTA to reside on a different server.
TextMaker is a word processor that launches quickly, needs little memory, does not require complicated setup, and has the full feature set of a modern high-end word processor. It reads and writes Microsoft Word 6/95/97/2000/XP, and Word 2003 files, and is available for Linux, Sharp Zaurus, and FreeBSD.
SMC anti-spam email filter is a software application (plug-in) designed to significantly reduce the amount of spam/UCE (junk-mail) you receive. SMC uses a greylisting-like technique to stop the junk-mail and a set of dynamic, automatic "whitelists" for unknown, but legitimate senders.