10 May
2011
10 May
'11
6:07 p.m.
Attachments with .dll or .exe extensions are sent over email.
Suggestion: use procmail to run SpamAssassin and/or CRM114 on incoming mail before you inject it into OTRS via postmaster.pl and discard any incoming email with a spam score of > 10. That's going to be much more effective than filtering inside OTRS. You might want to just go to a whitelist approach (ie, block anyone except known customers) in your MTA.