said by workablob:I discovered my outbound queue had 50K messages.
I have been through the Open-Relay hardening process already and am running on port 587 with Comcast SMTP as a smart host..
Yea, that's the most common experience I have with growing sites that haven't appropriately locked down their server yet went for years and years without issue.
said by workablob:The Connected Sessions were all from outside as the IPs were all Internet Routable.
Make sure these aren't bounceback messages! Your issue could still be internal...