Tuesday, April 19, 2005

The joy of spam bouncing at the mailserver level

This post regards the spam-handling features built into my Webhost, Pair Networks.

I get a lot of spam addressed to senator12@terranrobotics.com, as the sole administrator of the domain, ever since someone stole the company credit card information from a verification server (not from us, interestingly enough) and for some reason used that e-mail address to sign up for pornographic sites. I'd just been filtering this at the client end (my end), but today I finally noticed that I can set up custom mail handling "recipes" right on the mail server, and one of the options is to bounce e-mail addressed to a particular address.

Since I never get any legitimate e-mail at this address, I set it to bounce, waited a few minutes, and then sent my spam-plagued e-mail address a test message. It came back undeliverable, just as I had hoped. Since this is at the server level, as I understand it, it avoids the problem of replying to forged "From:" addresses.

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