Bob Tanner writes: > More or less this tries to verify the sender's address. Why would you want to do this? This merely encourages spammers to forge real addresses when sending spam, which causes harm to innocent users. Or, alternatively, they will start spamming with a null envelope sender (I'm surprised more spammers don't do this). Note that some mail servers will verify any address for a domain, even if it doesn't exist. qmail does this. This isn't a good solution for spam. It is easy to circumvent. In fact, many spammers already do. When you keep creating bogus "solutions" for spam, you make the solution worse than the problem: http://cr.yp.to/qmail/antispam.html -- David Phillips <david at acz.org> http://david.acz.org/ _______________________________________________ TCLUG Mailing List - Minneapolis/St. Paul, Minnesota http://www.mn-linux.org tclug-list at mn-linux.org https://mailman.real-time.com/mailman/listinfo/tclug-list