This script is Copyright (C) 1999-2016 Tenable Network Security, Inc.
The remote mail server is susceptible to a denial of service attack.
It was possible to perform a denial of service against the remote SMTP
server by sending it two HELO commands followed by a too long
argument. This allows an unauthenticated, remote attacker to deny
service to legitimate users of the server.
See also :
Contact the vendor for a fix.
Risk factor :
Medium / CVSS Base Score : 5.0