blaatenator:
- Port 25
- Port 194
- Port 465
- Port 587
- Port 994
- Port 6657
- Ports 6660-6670
- Port 6697
- Ports 7000-7005
- Port 7070
- Ports 8000-8004
- Port 9000
- Port 9001
- Port 9998
- Port 9999
Were you using the recommended reduced exit policy? It seems like it'd block most of the ports they're complaining about: https://trac.torproject.org/projects/tor/wiki/doc/ReducedExitPolicy
If you haven't, you might want to start now, and make sure it covers the extra ports they're mentioning, to make them happy.
You may also want to see the other of tips for running an exit node with less harassment: https://blog.torproject.org/blog/tips-running-exit-node-minimal-harassment