> I've been administering the same postfix server for years so I'm a little > confused as to how this happened. Granted postifx hasn't been updated in a > year or so. > > This morning I came in to a mailq of over 93000 messages all destine to > @yahoo.com.tw > > For now I'm just blocking all email destined for this domain but I would > really like to find out what happened. I haven't changed my main.cf > file for over a year. I can post it if needed.
Are you an open relay or did one of your user accounts get hacked. I'd check the envelope of one of the messages, cross that with where it originated and go from there. Just a shoot from the hip guess with little information.
