This indicates detection of an attempt to exploit a Buffer Overflow vulnerability in Ipswitch IMail SMTP Server.
The vulnerability is caused by an error in IASPAM.DLL. Exploitation may allow an attacker to execute arbitrary code with the privileges of the currently logged in user.
Ipswitch IMail 8.1
Ipswitch IMail 8.0.5
Ipswitch IMail 8.0.3
Ipswitch IMail 8.11
Ipswitch IMail 8.01
System Compromise: Arbitrary code execution.
Currently we are not aware of any vendor supplied patches for this issue.