> I am trying to configure a sendmail release 8 server to deliver mail it
> receives with a recipients domain name that it will backup MX for, and have
> it placed into a separate queue directory for later manual deliver by using
> the ETRN command.
This is not an inherent feature of sendmail. If you want it to do
that, you're going to have quite a bit of sendmail rewrite rules hacking
to get it to happen.
In fact, if you want it to be used with ETRN, putting it in a separate
subdirectory won't work, because the daemon knows about one and only one
queue directory -- /var/spool/mqueue (or whatever it's called on your
OS). Putting stuff in a separate queue would make it totally invisible to
the sendmail daemon.
It shouldn't be necessary to put these messages in a separate queue.
With a slight amount of work, you can put those domains for which you
provide backup MX and mail queueing (via ETRN) into a mailertable that
selects a different version of the SMTP delivery agent (one that is marked
as "Expensive"), and then you make sure that you don't deliver to
expensive agents by default.
I believe that this is addressed in the sendmail FAQ at
"If you wouldn't take out a one-page ad in the Wall Street Journal to
say something, then don't say it by email." -B. Knowles, 20 Jul 1998