Release Notes: The Smart Sender Notification Suppression was made a bit smarter. See SECURITY_TRUSTED_MTAS in the Configuration documentation for more details. The DISCARD and NOTIFY tie-in was fixed, so it can now DISCARD without notifying. .tmp files are now cleaned up on mimencode failure. Updating to this version is highly recommended, as it will not respond to forged NovArg/MyDoom attack messages.
Release Notes: This release added default poisoning of the application/x-msdownload MIME type in response to a new worm. Full MIME-type poisoning support will be available shortly. This release was accelerated for security reasons.
Release Notes: The unrar executable check was fixed to not test for unrar if RAR scanning is already explicitly disabled by $DISABLE_RAR_SCAN. Recipient notification now works when sanitizing on a relay (e.g. in front of an Exchange server).
Release Notes: RAR archive scanning and the ability to mangle or poison WMF image files were added.
Release Notes: This release fixes bugs in scanning of multi-layered MIME attachments, and an infinite loop on certain MIME boundary strings.
Release Notes: Scanning of JPEG attachments to detect Microsoft BO attempts was added. A minor bugfix was made in .ZIP and document scanning.