OT: sendmail`s ETRN functionality and forcing queueing for a domain

From: Michael Schneider (lists@calispera.com)
Date: Fri Nov 21 2003 - 09:45:23 EST


This one is definitely for the sendmail gurus...

I have a mail server that is happily accepting mail for our own users
as well as a number of hosted domains. Apart from domains for which
we are secondary MX for, currently all other email is being delivered
into local mailboxes (from which it is all being POP`ed).

So far, so good.

What I am now faced with is hosting a domain for which email is
accepted and *queued* only - never actively delivered during mail
queue runs. The client (soon to be several) is using lotus domino and
they will want to collect their mail with the ETRN protocol.

There are some hints for doing this sort of thing to be found here:

        http://www.sendmail.org/~ca/email/more.html

which details two methods of setting up MX records in the DNS to get
this to happen. However...

        "sendmail on your system will try to deliver mail during queue
        runs, however, the client may trigger delivery by using the
        ETRN command."

Is there any way to tell sendmail to just queue and NOT attempt direct
delivery - ever - of email to any specific domain? All these domains
will have their respective servers do ETRN to trigger delivery.

Regards

--
Michael
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