Mailenable MTA Keeps stopping

[pseconds]

I got some reports today that people were not getting expected email.

I looked in ..\mailenable\queues\smtp\inbound and nearly crapped when I saw 23,000 messages going back to last Thursday. I restarted the MTA, it stopped again after about 10 minutes, nothing in any logs I could see to indicate why. I can't seem to keep the service running.

Here's what I've got:
Windows 2003 r2 server, fully patched
Quad-core cpu with 4gb of memory, 700mb or so in use.
Plesk for Windows 8.3.0
Kaspersky Antivirus 5.0.0.49
MailEnable Standard 1.981

MTA settings are set to 8 threads.

I've got 20+ ensim servers and this is my first Plesk box, 2 months old.

Any ideas on how to keep the service running?

 

[ally@]

have you installed MailEnable updates?

i can see there is recent update on MailEnable which addresses MTA service hang
http://mailenable.com/hotfix/default.asp