[78033] in North American Network Operators' Group
Re: Why do so few mail providers support Port 587?
daemon@ATHENA.MIT.EDU (Valdis.Kletnieks@vt.edu)
Wed Feb 16 12:19:07 2005
To: Owen DeLong <owen@delong.com>
Cc: Thor Lancelot Simon <tls@netbsd.org>,
Adrian Chadd <adrian@creative.net.au>, nanog@merit.edu
In-Reply-To: Your message of "Wed, 16 Feb 2005 01:46:09 PST."
<2147483647.1108518369@[172.17.1.152]>
From: Valdis.Kletnieks@vt.edu
Date: Wed, 16 Feb 2005 12:18:19 -0500
Errors-To: owner-nanog-outgoing@merit.edu
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On Wed, 16 Feb 2005 01:46:09 PST, Owen DeLong said:
>
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>
> Um, you actually have to work somewhat to get sendmail to support
> unauthenticated submission on port 587. The default configuration
> is that port 25 is unauthenticated (albeit with some restrictions
> on relaying (only for local clients)) and port 587 is authenticated.
>
> As such, I'm not sure why you seem to think that sendmail on port 587
> is unauthenticated.
Umm.. because the Sendmail 8.13.3 tree has this:
(from cf/README):
----
If DAEMON_OPTIONS is not used, then the default is
DAEMON_OPTIONS(`Port=smtp, Name=MTA')
DAEMON_OPTIONS(`Port=587, Name=MSA, M=E')
----
from doc/op/op.me:
That is, one way to specify a message submission agent (MSA) that
always requires authentication is:
.(b
O DaemonPortOptions=Name=MSA, Port=587, M=Ea
.)b
Hmm.. no default 'a' to require authentication by default.
That would probably explain why you actually have to work to set it up.
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