Summary
The remote host is running the ArGoSoft WebMail interface.
There are multiple flaws in this interface which may allow an attacker to bypass authentication, inject HTML in the e-mails read by the users and even to read arbitrary files on that server.
*** OVS solely relied on the banner of this service to issue *** this alert.
Solution
Upgrade to ArGoSoft 1.8.7.0 or newer