Preventing our Exchange server from spamming others

[rbeaber 0]

Occasionally we will have a user that will click on something they're not supposed to and end up with a compromised email account.  Then their account will send out thousands of emails to various addresses.  Is there anything that ESet Mail Security can do to prevent this?  We are running version 6.2, but still have had this occur.  All clients are running Antivirus 6.2 also.

 

Any help or suggestions?

 

Thanks,

 

-Rick