The SMTP server running on the remote Windows host has multiple buffer overflow vulnerabilities.
A vulnerable version of GroupWise Internet Agent is running on the remote host. The software contains unspecified buffer overflow vulnerabilities that are triggered when processing email addresses and other specially crafted SMTP requests. This could allow a remote attacker to crash the service or execute arbitrary code as SYSTEM.
Upgrade to Novell GroupWise version 7.03 HP3 / 8.0 HP2 or later.