[145842] in North American Network Operators' Group
Re: Outgoing SMTP Servers
daemon@ATHENA.MIT.EDU (Owen DeLong)
Tue Oct 25 05:40:40 2011
From: Owen DeLong <owen@delong.com>
In-Reply-To: <alpine.DEB.2.00.1110250726140.11931@uplift.swm.pp.se>
Date: Tue, 25 Oct 2011 02:35:31 -0700
To: Mikael Abrahamsson <swmike@swm.pp.se>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Oct 24, 2011, at 10:27 PM, Mikael Abrahamsson wrote:
> On Mon, 24 Oct 2011, Dennis Burgess wrote:
>=20
>> I am curious about what network operators are doing with outbound =
SMTP
>> traffic.
>=20
> Block all TCP/25 and require users to use submit with authentication =
on TCP/587.
>=20
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?
Further, if you make them use AUTH somehow, but, you don't force TLS, =
then, you are
doing more harm than good IMHO.
Owen
