I want to know what I can do (aside from moving to Exchange 2003) to have my Exchange server query an outside blacklist of spammers and open relays, so that I can stop trying to manually block them by IP on the firewall. I have read that this functionality is available using a third-party tool. Do you have any recommendations for software and setup?
I'm not discouraging you from using blocklists, but I wouldn't depend on them. It is fairly easy for spammers to work around them by spoofing domains and IP addresses. A good site I would recommend looking at is SPAMHAUS.
MEMBER FEEDBACK TO THIS ASK THE EXPERT Q&A:
Richard is mistaken (out of date) about Symantec's antispam solution. It is called Symantec Premium Antispam, and is derived from their BrightMail acquisition last year. It works in conjunction with Symantec Mail Security, which the question-asker already has.
Brightmail, even though it is now owned by Symantec and aside from any bias, is still an add-on service that is subscription based and is not included with Symantec Antivirus for Exchange. Please see Symantec Mail Security for Microsoft Exchange.
—Richard Luckett, spam and security expert
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