Would an autoresponder for my domain email trigger a listing in CBL databases in response to spam received? 1 comment
Posted at 9:26 am in Security
Over the past several weeks, my mail server ended up in the CBL/XBL block lists, with some domains refusing to accept my email. I don’t have an open relay or an open proxy, and my anti-virus and patches are up-to-date. I wonder if this would be caused by my autoresponders to the postmaster@domain.com address, which, when replying to spam emails with false addresses, might be causing the server receiving my reply to think that my auto-response is spam.
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linux_uber_geek
14 Feb 09 at 10:06 pm
If you’re sending mail to the postmasters of domains forged into spam headers, it’s entirely possible you’re hitting some address that feeds the CBL. Note that it’s IP-based, not domain-based, and you can look up your IP address to see its status.
My advice is not to use an autoresponder on spam; the FP rate’s too high unless you have a really, really good parser.