Date: Thu, 13 Mar 2008 03:54:40 +0200 From: Giorgos Keramidas <keramida@ceid.upatras.gr> To: Doug Poland <doug@polands.org> Cc: questions@freebsd.org Subject: Re: Best practice: sendmail and SMTP auth Message-ID: <20080313015440.GA2388@kobe.laptop> In-Reply-To: <9587.208.49.58.254.1205349581.squirrel@email.polands.org> References: <9587.208.49.58.254.1205349581.squirrel@email.polands.org>
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On 2008-03-12 14:19, Doug Poland <doug@polands.org> wrote:
> Hello,
> Not sure if this is the most appropriate place for this
> question, but since all my servers are FreeBSD 6.x/7.x, I'll
> give it a go...
>
> I am considering setting up SMTP auth on a number of sendmail
> instances that I control. After much googling and reading, it
> is not clear to me that a server with SMTP auth
> configured/enabled can relay mail in both auth and non-auth
> modes.
>
> If one sendmail configuration cannot accommodate both SMTP auth
> and access.db, does one setup a dedicated SMTP auth host with a
> SMART_HOST option and feed incoming email to an non-auth
> instance of sendmail?
Sure it can.
One of the ways to do something like this is:
[1] Configure Sendmail to *require* authentication when one
connects to its `submission' port (TCP port 587), and keep
using /etc/mail/access for the default listener of the `smtp'
port (TCP port 25).
[2] Then you can configure your `trusted' clients to connect
through port 587, and let everyone else keep using port 25.
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