This script is Copyright (C) 2004-2011 Tenable Network Security, Inc.
The remote SMTP server has multiple buffer overflow vulnerabilities.
According to its version number, the version of Courier MTA running
on the remote host has multiple buffer overflow vulnerabilities. A
remote attacker could exploit this to crash the service, or possibly
execute arbitrary code.
Upgrade to Courier 0.45 or later.
Risk factor :
Critical / CVSS Base Score : 10.0
CVSS Temporal Score : 7.4
Public Exploit Available : false