CVE-2007-3803
The SMTP ALG in Clavister CorePlus before 8.80.04, and 8.81.00, does not properly parse SMTP commands in certain circumstances, which allows remote attackers to bypass address blacklists.
Date published : 2007-07-16
http://www.clavister.com/releasenotes/CorePlus_Release_Notes_8_80_04.pdf
http://www.clavister.com/releasenotes/CorePlus_Release_Notes_8_81_01.pdf