[145854] in North American Network Operators' Group
Re: Outgoing SMTP Servers
daemon@ATHENA.MIT.EDU (Carlos Martinez-Cagnazzo)
Tue Oct 25 11:29:18 2011
In-Reply-To: <87aa8p6y2b.fsf@nemi.mork.no>
Date: Tue, 25 Oct 2011 13:28:05 -0200
From: Carlos Martinez-Cagnazzo <carlosm3011@gmail.com>
To: nanog@nanog.org
Reply-To: carlos@lacnic.net
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
I'm curious how a traveller is supposed to get SMTP relay service
when, well, travelling. I am not really sure if I want a VPN for
sending a simple email.
And I can understand (although I am not convinced that doing so is
such a great idea) blocking 25/tcp outgoing, as most botnets will try
that method of delivery. However, I do believe that outgoing 465
SHOULD always be allowed.
regards
Carlos
On Tue, Oct 25, 2011 at 10:43 AM, Bj=F8rn Mork <bjorn@mork.no> wrote:
> Owen DeLong <owen@delong.com> writes:
>
>> It's both unacceptable in my opinion and common. There are even those
>> misguided souls that will tell you it is best practice, though general a=
greement,
>> even among them seems to be that only 25/tcp should be blocked and that
>> 465 and 587 should not be blocked.
>
> It is definitely considered best practice in some areas. =A0See e.g.
> http://translate.google.com/translate?hl=3Den&u=3Dhttp://ikt-norge.no/wp-=
content/uploads/2010/10/bransjenorm-SPAM.pdf
> (couldn't find an english original, but the google translation looks OK)
>
> The document is signed by all major ISPs in Norway as well as the
> Norwegian research and education network operator, so it must be
> considered a local "best practice" whether you like it or not.
>
> Note that only port 25/tcp is blocked and that some of the ISPs offer a
> per-subscriber optout.
>
> Eh, this was the Northern Aurope NOG, wasn't it?
>
>
>
>
> Bj=F8rn
>
>
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Carlos M. Martinez-Cagnazzo
http://www.labs.lacnic.net
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