MailScanner

A Free Anti-Virus and Anti-Spam Filter
Protecting over 5 billion e-mails every week, for many tens of millions of users

1/1/2005	Released stable version 4.37.7. This has improvements in the phishing net, ability to add any arbitrary headers to messages, ability to keep infected spam out of the spam archive, handle split sendmail queues and many improvements and changes. See the Change log.
29/12/2004	Released beta version 4.37.6. Added important fix for some bounce messages from Hotmail that were killing it. All other changes are in the Change Log.
18/12/2004	Released beta version 4.37.5. Arbitrary headers can now be added to messages depending on their spam and/or mcp status. This is done by specifying the headers (surrounded in ") in the appropriate "Spam Actions" settings (and its relatives). All other changes are in the Change Log.
12/12/2004	Released beta version 4.37.2. This can now keep viruses out of the spam and mcp quarantines, so you can safely give your users access to the spam quarantine without them getting viruses. See the option "Keep Spam And MCP Archive Clean". Note this is switched off by default as not many people quarantine spam anyway, and so don't want the performance hit of virus checking all spam. All other changes are in the Change Log.