We've replied to a couple of your tickets. The one department that has email importing configured (your support department) appears to have email coming in just fine. (A reply to a ticket was received about 2 hours ago.) However, I took a look at the POP logs anyway and there aren't any errors. So that department should be good.
You have 2 other departments set up in SmarterTrack, but neither of those have POP accounts set up for them. Those are your Sales and Estimates, and Development departments. You'll want to set up POP accounts for those 2 departments as well so that they start receiving tickets.