Jeroen Geilman put forth on 3/31/2011 2:16 PM: > Backscatter can be a HUGE problem, especially when spammers send you > bounces (with the empty mailer-daemon sender address <>), since you MUST > accept those.
Spammers don't send backscatter bounces. The victim MX hosts do, by definition. In this case I've not seen any for many years. Backscatter once was a HUGE problem, but not today. As most, if not all, forged sender address spam comes from bots, and most MXen on the planet today are far better equipped to reject bot spam, the rest of us don't suffer the backscatter as we once did. In the case of spammers directly sending spam disguised as fake mailer-daemon messages, those are dealt with here via the same methods I use against all other spam, which is probably why I never see them these days--blocked at SMTP time. Finally, snowshoe spammers don't bother to forge valid sender addresses, as that requires extra work--most spammers are lazy. Snowshoe spammers use throw away domains, and simply make up random sender addresses in that domain. -- Stan
