CRHC uses some functionality from spamhaus.org, which in turn pulls from CBL or the Composite Blocking List (http://cbl.abuseat.org/). Blocking spam is great and all, but I really think that:
- I am not a spammer, and my IP has never been used for spam while I owned it.
- You need more than HELO strings to determine if someone is a spammer
- If you claim I’m a spammer, you should be at least able provide areason.
- If I tell you to remove me from your list, REMOVE ME and don’t just add me back in a couple hours.
IP blacklisting for spam might work, but at the cost of blacklisting tons of people who aren’t spammers. Seems to me like another broken attempt to solve the “spam problem”.
UPDATE: Spamhaus was successfully sued in the U.S. for incorrectly blocking an email from an entire company. Quote: “A federal judge on Wednesday ordered the Spamhaus Project, an international anti-spam organization, to pay $11.7 million in damages to Wheeling-based e360 Insight LLC for blacklisting the company.” Spamhaus wont pay up either. Google for spamhaus litigation for the rest of the story.