[107800] in North American Network Operators' Group
Re: ingress SMTP
daemon@ATHENA.MIT.EDU (Matthew Moyle-Croft)
Sat Sep 13 23:58:35 2008
Date: Sun, 14 Sep 2008 13:28:00 +0930
From: Matthew Moyle-Croft <mmc@internode.com.au>
To: *Hobbit* <hobbit@avian.org>
In-Reply-To: <20080914012859.85AAB7808@relayer.avian.org>
Cc: nanog@nanog.org
Errors-To: nanog-bounces@nanog.org
*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. username@isp.net.au)
If you're forcing people to use your mail servers as a smart host then
you wouldn't be very popular ...
MMC
