[IMail Forum] Imail queue keeps flooding!!

[Nico Gazzano]

I'm having a serious problem with my Imail server.  About 3 times in the 
past two weeks I have had to go in and stop all imail services and 
delete GSE, SMD, and VAC files in the spool directory because something 
is flooding the queue, roughly 5k-6k messages in a matter of minutes. 

To bandage it up I run my sniffer and block the culprit IP on the 
perimeter.  More of a deterrent than a solid fix, but I can't find the 
cause of the problem and I was wondering if someone can point me in the 
right direction. 

I'm also looking into using and ISCSI SAN to hold my domains/users/spool 
directories, has anyone implemented this and does it work well?

iMail setup is as follows:
  
   Installed on VMware Host
   using local user authentication.
   using local mailbox folders.
   relaying only allowed for specified IP addresses.
   no AV on server
   external barracuda spam filter
   Not using virtual domains
  

-Nico