The remote host is vulnerable to a Denial of Service (DoS) attack.
The remote host is running a version of MailEnable's WebMail service that is prone to a remote Denial of Service (DoS) attack. Specifically, an attacker sending malformed web data can crash the service. An attacker exploiting this flaw would only need to be able to create and send a malformed email to a valid WebMail user. Successful exploitation leads to a loss of availability.
Upgrade to MailEnable Professional 1.73 or higher or to MailEnable Enterprise Edition 1.21 or higher.