Date: Wed, 11 Sep 2002 17:30:03 +0200 From: lupe@lupe-christoph.de (Lupe Christoph) To: Greg Panula <greg.panula@dolaninformation.com> Cc: freebsd-security@freebsd.org Subject: Re: asmtp 587 - quickie faq submission Message-ID: <20020911153003.GD19536@lupe-christoph.de> In-Reply-To: <3D7F3726.958781C8@dolaninformation.com> References: <002b01c25930$f4627270$0100a8c0@soap> <3D7F3726.958781C8@dolaninformation.com>
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On Wednesday, 2002-09-11 at 07:29:26 -0500, Greg Panula wrote:
> Ok, here is the cleaned-up faq submission for asmtp & port 587.
Ok, here is further nitpicking :-)
> Q: What is ASMTP?
> A: Authenticated SMTP, explained in RFC 2554
> Q: What is ASMTP good for?
> A: Allow the SMTP server to authenicate users before allowing them to
^t
> use the smtp service for sending mail. Useful if you have roaming users
> that connect from foreign networks(e.g. hotel somewhere).
Buddy can you spare a space ^here?
> Q: How do I or my users make use of ASMTP?
> A: The user's email client needs to be configured to authenicate
^t
> themselves to the smtp server. Earthlink has a FAQ section explaining
clients/themselves or client/itself
> various email client configurations at
> http://support.earthlink.net/mu/1/psc/img/walkthroughs/Help_FAQ/7280.psc.html
> Q: How do I implement ASMTP on my mailserver?
> A: Depends on your MTA. For information about configuring ASMTP&Postfix
> checkout: http://howto.state-of-mind.de/
We still need an explanation for sendmail! I found nothing better than
http://www.sendmail.org/~ca/email/auth.html which doesn't look very
/usr/friendly to me ;-)
The default sendmail in FreeBSD is not compiled with SASL and does not
do ASMTP. I suppose one must install the sendmail-sasl port for this.
I'm doing that next, but can't test very much with it, due to my setup.
> Q: Why does Sendmail listen on Port 587?
> A: For compliance with RFC 2476 which states that seperating the
separating
> different parts of mail handling(submissions&transfers) is a good thing
^space
> and port 587 was deemed to be the port for handling submissions.
> Sendmail 8.10.0 introduced DaemonPortOptions to support this. Checkout
> http://www.sendmail.org/~gshapiro/8.10.Training/DaemonPortOptions.html
> for some quick info about DaemonPortOptions.
> Q: How do I turn off the Message Submission Agent aka stop Sendmail from
> listening on port 587?
> A: Add FEATURE(`no_default_msa') your config.mc config file and recreate
> your sendmail.cf file. Brief example of recreating your sendmail.cf can
> be found at: http://www.sendmail.org/m4/intro.html
Lupe Christoph
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