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Date: Wed, 14 Jul 2004 10:14:27 +0100 (BST)
From: Jan Grant <Jan.Grant@bristol.ac.uk>
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To: Eric Crist <ecrist@secure-computing.net>
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cc: Giorgos Keramidas <keramida@ceid.upatras.gr>
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Subject: Re: closer, no cigar.
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On Tue, 13 Jul 2004, Eric Crist wrote:

> On Tuesday 13 July 2004 22:19, Giorgos Keramidas wrote:
> > The first of these processes is sendmail started in submit mode by the
> >
> > `rc.sendmail' startup script.  The relevant rc.conf options are:
> > : sendmail_enable="NO"
> > : sendmail_submit_enable="YES"
> > : sendmail_submit_flags="-L smtpd -bd -q30m
> > : -ODaemonPortOptions=Addr=localhost"
> >
> > - Giorgos
>
> Can you exlpain exactly what submit mode is for?  Is it something you want
> running on a production mail server?

Eric, the first three paragraphs of section 1 of RFC 2476 explain this.

In a nutshell: an MTA is not supposed to "munge" email (apart from
adding Received: headers and the like); however, many local clients
submit via SMTP and the mail server needs to do lots more work:
rewriting email addresses, and so on. The split of sendmail's operation
into MTA (Transmission) and MSA (Submission) is to support this.

-- 
jan grant, ILRT, University of Bristol. http://www.ilrt.bris.ac.uk/
Tel +44(0)117 9287088 Fax +44 (0)117 9287112 http://ioctl.org/jan/
Whose kung-fu is the best?