[Black Tiger]

I have exactly the same problem and had installed ezbounce already a while ago.
These are my installed hacks:
1.) Atakan Marquee Text
2.) Cyb - Advanced Forum Statistics
3.) Moderator Statistics
4.) Post Thank You hack
5.) Un-Activated User Management

And ofcourse Ezbounce. None of the above hacks have anything to do with mail except the Un-activated user management which only checks the "waiting confirmation" usergroup while Ezbounce is checking only the "read-only" group which I created myself.