[145847] in North American Network Operators' Group
Re: Outgoing SMTP Servers
daemon@ATHENA.MIT.EDU (Valdis.Kletnieks@vt.edu)
Tue Oct 25 06:32:15 2011
To: Owen DeLong <owen@delong.com>
In-Reply-To: Your message of "Tue, 25 Oct 2011 02:35:31 PDT."
<6F877A0C-5CAB-4856-86C6-3408518BFD71@delong.com>
From: Valdis.Kletnieks@vt.edu
Date: Tue, 25 Oct 2011 06:29:15 -0400
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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On Tue, 25 Oct 2011 02:35:31 PDT, Owen DeLong said:
> If they are using someone else's mail server for outbound, how, exactly do you control
> whether or not they use AUTH in the process?
1) You don't even really *care* if they do or not, because...
2) if some other site is running with an un-AUTHed open port 587, the miscreants will
find it and abuse it just like any other open mail relay. The community will
deal with it quick enough so you don't have to. And at that point, it's the
open mail relay's IP that ends up on the block lists, not your mail relay's IP.
Other people running open port 587s tends to be quite self-correcting.
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