Software Version 4.4.1

Global spam filter under "Services > Email filter > Spam : Global"
Server wide spam filter black-/whitelists
Lockruf and Fax are allowed to use the same MSNs
Proxy authentication of individual computers/areas has priority over the network card
MTU size for PPPoE/PPTP DSL adjustable
Email filter quarantine download improved
Faster changes to network cards and routings
"Allow mail transfer locally only" configurable again
Improved security on Linux base system (file-4.12, php-4.3.10, samba-3.0.10)