"Julian Brown" <[EMAIL PROTECTED]> writes:

> So from what you are saying TMDA is not an SMTP server? or is it?  Someone
> says its like Procmail?

It's not an SMTP server (also called a Mail Transfer Agent).  After
mail has been received at your site, your MTA will attempt to deliver
it to a user's mailbox.  TMDA is a delivery agent that runs during the
delivery process.  For most MTAs, you can run it from the user's
.forward file.  People on the list have also configured Postfix and
Exim to run it automatically, so users don't need to invoke it from
a .forward file.

There are two "parts" to TMDA.  First, TMDA runs as a delivery agent,
processing incoming mail (*to* your users) and generating challenges
to unrecognized senders.  Many people use only this "part".

Second,
TMDA can tag the From:, Reply-To: and envelope sender addresses of
outgoing mail (sent by your users).  There are dated tags, sender tags
and keyword tags.  If your users are local, system users, they
configure their mail program to send using 'tmda-sendmail' instead of
'sendmail' and TMDA will tag the outgoing mail before relaying it
through your MTA.  If your users are roaming, they would need to
connect to 'tmda-ofmipd' and authenticate using SMTP-AUTH.  The
'tmda-ofmipd' program will then tag the mail and relay it through your
MTA.

> How do most people deploy TMDA? with or without Sendmail or some similar?

You must run one of the supported MTAs, qmail, Postfix, Exim, Courier
or Sendmail, in addition to TMDA.  If you choose Sendmail, you will
need to configure Procmail as the delivery agent and each user will
then run TMDA from their .procmailrc.


Tim
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