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From: essick@uiucdcsb.UUCP
Newsgroups: net.mail
Subject: Re: is there a right way use to the map
Message-ID: <9600006@uiucdcsb.UUCP>
Date: Mon, 19-Nov-84 10:46:00 EST
Article-I.D.: uiucdcsb.9600006
Posted: Mon Nov 19 10:46:00 1984
Date-Received: Wed, 21-Nov-84 01:01:47 EST
References: <22@politik.UUCP>
Lines: 26
Nf-ID: #R:politik:-2200:uiucdcsb:9600006:000:1157
Nf-From: uiucdcsb!essick    Nov 19 09:46:00 1984

Here are the University of Illinois, we've avoided modifying
sendmail to do UUCP routing.  Instead we changed the sendmail
definition of the UUCP mailer to point to a program which does path
expansion.

Our path expanding program gets a user list and a UUCP host, looks
in our path tables (/usr/local/lib/usemap) and builds a proper
uux invocation.  Sendmail's configuration file can be frozen
to improve performance and the path file can be updated without
worrying about re-freezing the sendmail file.

This scheme does cost us in some respects.  If a letter is destined
to a number of users and the first hop for all of them is the same,
we send multiple copies over the wire. This is because sendmail
sees that each letter is destined for a different site and makes
separate calls to the uucp mailer for each letter. (Actually,
we don't even combine UUCP letters when the desination site is the
same. This is mostly because the path expander only expects a
single desination user and I'm too lazy to rework it to accept more.

Sufficient interest in this filter will result in its being posted
to net.sources....


-- Ray Essick, University of Illinois