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SPF

(posted at 2007-11-28 20:22:37 UTC)

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Please turn it on in your mail servers.

Someone's done a spam run with a fake @slamd64.com address. By not using SPF and checking the source of mails, you are:

  • Giving yourself problems (more spam)
  • Giving me problems (1200 bounces to emails I didn't send

Also:

  • Use spam blacklists
  • Don't accept then bounce; reject it in the smtp transaction - otherwise, you're a spammer

Comments

Don't use blacklists

Posted at 2007-11-28 20:57:56 UTC by "Jay"

Hi! I'm ISP postmaster. I'll say you - don't use blacklists. It's true way to lose legal mail because of some spammer/virus in your network. Use greylisting, antispam rules and bayesian filters.

SPF

Posted at 2007-11-29 00:50:23 UTC by "Anonymous"

There are probably more spammers with SPF correctly configured than legit mail servers :)

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