North American Network Operators Group
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Re: ingress SMTP

  • From: Matthew Moyle-Croft
  • Date: Sat Sep 13 23:58:23 2008
*Hobbit* wrote: 
   > How do you alert mail server operators who are smarthosting their
   > e-mail through you that their outbound messages contain spam?

You don't let them falsify their envelope or headers to contain
fields utterly unrelated to your own infrastructure, for starters.
They try it, their mail bounces. It's a very rare piece of
spam that actually comes from who it says it comes from anymore.
Are you suggesting that only ISP domains should be allowed through? (eg. [email protected])
If you're forcing people to use your mail servers as a smart host then you wouldn't be very popular ...

MMC