Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!ux1.cso.uiuc.edu!ux1.cso.uiuc.edu!uxc.cso.uiuc.edu!paul
From: paul@uxc.cso.uiuc.edu
Newsgroups: comp.mail.sendmail
Subject: Re: MX and Domain Wildcarding With IDA
Message-ID: <218300006@uxc.cso.uiuc.edu>
Date: 11 Oct 89 16:40:18 GMT
References: <4160@itivax.iti.org>
Lines: 26
Nf-ID: #R:itivax.iti.org:4160:uxc.cso.uiuc.edu:218300006:000:984
Nf-From: uxc.cso.uiuc.edu!paul    Oct 10 18:02:00 1989


UIUC's mail machine (uxc.cso.uiuc.edu) provides MX forwarding for some
25-odd domains using sendmail 5.61 + IDA 1.2.8.  Our procedure is as
follows:

1) Establish bi-directional UUCP connections with contact information
   recorded in the /usr/lib/uucp/Systems file.

2) Once the link is established, notification goes off to nic.ddn.mil AND
   uucpmap@rutgers.edu .  The message to uucpmap@rutgers.edu contains an
   updated map entry for the site with two new items.  The first is a
   link to the domain, e.g., site frito has the UUCP link to uiucuxc and
   also has the FQDN of frito.mi.edu:

   frito	.mi.edu

3) The mailertable file has an entry added of the form

UUCP:frito	frito.mi.edu

A message arriving at uxc addressed to user@foo.mi.edu causes a MX lookup
to the usual servers.  The best MX value points to uxc which causes sendmail
to fall through to pathalias data.  foo.mi.edu fails so it's re-tried as
.mi.edu.  This finds the path frito!%s and off it's sent.

/pbp