Hmm, I would rather estimate it to around 99% on our multi-domain mailserver, including the connections we deny at the SMTP level on the basis of rules like "deny systems that do not know their hostnames" or "deny systems that cannot do a proper SMTP greeting".Spammers are working every day to cause more abuse. Postmasters are trying to stay ahead of them, but we still see that over 90% of all traffic to port 25/tcp is abuse.
Cheers, Jakob Curdes
