Exchange 2007 - IP Block List Providers
Right, I have no idea where I'm going wrong here now. Using Exchange 2007 (vanilla, and not worth SPing - upgrading to 2010 soon on 2008R2/Hyper-V) and I have the anti-spam agents set up, which do work - content filtering and everything else does its thing quite happily.
The exception to this is the IP Blocklist Providers - I've added zen.spamhaus.org (and bl.spamcop.net) but running the test (Crynwr spam blocking resources) gives me no joy at all.
Any clues on what I'm missing? It's the sole Exchange Server, Hub Transport, works quite happily otherwise, just this won't stick, whether I use the EMC or the EMS.