CBL Composite Blocking List problem

Hello A-S-K-users,

Recently I've been finding that my mail server (upon which ASK
resides) has fallen foul of the Composite Blocking List at
http://cbl.abuseat.org because they have detected spam with my
server's IP on it. They say that this is most likely due to a virus
infected PC in the network being used remotely by a spammer, but I
know for a fact (OK I'm only 99.99% certain) that this cannot be the case.

So I'm beginning to wonder if the confirmation messages that ASK sends out are being interpreted by someone somewhere as spam.  If this is the case, then "Houston we have a problem".

Anyone else got any thoughts on this?

Also: Marco - the SBL seems like quite a good idea (as long as it only traps the baddies) and it can be freely downloaded - have you thought of integrating it into ASK?

Regards

Paul