This indicates an attack attempt to exploit a Buffer Overflow vulnerability in Novell GroupWise.
The vulnerability is due to an improper boundary check condition in the application when handling a malicious SMTP command. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application, via a crafted SMTP command.
Novell Groupwise 6.5.x
Novell Groupwise 7.0
Novell Groupwise 7.01
Novell Groupwise 7.02x
Novell Groupwise 7.03
Novell Groupwise 7.03HP1a
Novell Groupwise 8.0
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.