Hi,
At torservers.net, we run some large exit relays with an "allow all except port 25" policy.
These are statistics from ARM showing exit port statistics of a fast exit running for seven hours at 30-40 MB/s:
443 HTTPS 17650 (%55) 80 HTTP 10625 (%33) 8344 739 (%2) 8333 84 51413 45 6881 Torrent 38 8337 29 993 IMAPS 23 45682 18 182 16 9001 16 4662 eMule 14 4661 12