The remote host is vulnerable to a Denial of Service (DoS) attack.
The remote host is running Ipswitch IMail, an server that sends clients email via a web interface. It runs on Microsoft Windows operating systems. Ipswitch IMail is reported to be vulnerable to multiple remote denial of service in the following modules: 'Queue Manager', 'Web Messaging' and 'Web Calendar'. An attacker may use these weakness to deny service to legitimate users. It is conjectured that these issues may allow remote arbitrary code execution.
Upgrade to IMail 8.13.0 or higher.