We recently added the Spamhaus Real-Time Block List to our Exchange Server configuration. It has had an incredible impact on the volume of spam hitting our Exchange server. We implemented the Spamcop Block List last year, and it did not have nearly the impact the Spamhaus has. Spamhaus has cut our spam volume by about 90%. That is incredible. Spamhaus, we thank you.
Posted by Matt Laufer at 12:23 AM