Software Version 4.6.5

Group based incoming attachment filter under "Services > Email filter > Attachment > Filter lists" as well as "User manager > Groups : Permissions".
New version of the spam filter (SpamAssassin-3.1.3)
External email server name can be set
Local domain is now an independent domain under "Services > Email > Domains
Checking of email recipient addresses for domain forwarding
Correct display of umlauts in statistics
Improved security on Linux base system (kernel-2.4.32: CVE-2006-2444, php-4.4.2: CVE-2006-1990)
Update of Linux base services (squid-2.5.STABLE14)