This script is Copyright (C) 1999-2013 Tenable Network Security, Inc.
An open SMTP relay is running on this port.
The remote SMTP server allows anyone to use it as a mail relay, provided
that the source address is set to '<>'.
This problem allows any spammer to use your mail server to send their
mail to the world, thus wasting your network bandwidth and possibly
getting your mailserver blacklisted.
Reconfigure your SMTP server so that it cannot be used as a relay
Risk factor :
High / CVSS Base Score : 7.8
Family: SMTP problems
Nessus Plugin ID: 10167 ()
CVE ID: CVE-1999-0819