I administer an Exchange 2007 server. I have set up antispam, and are using 4 blocklists. We have seen a few cases of legitimate email being blocked (in one case Gmail). It seems that one (or more?) blocklists is a tad agressive. Problem is, once the user gets back to me, the IPs in question are no longer lised anywhere, so I cannot tell which block list is causing problmes.
Is there any way i can set up some sort of logging to determine which block list was used?