paul@uxc.cso.uiuc.edu (10/11/89)
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