Path: utzoo!attcan!uunet!elroy.jpl.nasa.gov!decwrl!sgi!rpw3@rigden.wpd.sgi.com From: rpw3@rigden.wpd.sgi.com (Rob Warnock) Newsgroups: comp.mail.uucp Subject: Re: local site in a domain Message-ID: <88556@sgi.sgi.com> Date: 2 Mar 91 15:36:26 GMT References: <87512@sgi.sgi.com> <8YF-!-?@b-tech.uucp> <87732@sgi.sgi.com> <88013@sgi.sgi.com> Sender: guest@sgi.sgi.com Reply-To: rpw3@sgi.com (Rob Warnock) Organization: Silicon Graphics, Inc., Mountain View, CA Lines: 47 In article <88013@sgi.sgi.com> vjs@rhyolite.wpd.sgi.com (Vernon Schryver) writes: +--------------- | > >[rules at at sgi.com include:] | > > foo!user is immediately converted to user@foo | > > user@bar is routed to: | > > (1) bar.sgi.com if existent | > > (2) directly connected UUCP neighbor if existent | > > else (3) bounced | > I assume that you also implement the policy that you won't have any | > external uucp neighbors that have a uucp name the same as one of your local | > names? Otherwise, someone offsite sending mail (routed via the | > uucp maps) might send to sgi!foo!user and not have it end up where | > they expected... | | Yes: I think it would be silly, ridiculous, wrong, impolite, and a | sign of Bad Breeding to advertise in the UUCP maps a route to one | place and send mail somewhere else. | | No: mail to sgi!!user, where is not in the sgi | map entry and is in the sgi.com domain will go to the sgi host. +--------------- Actually, it's a little better than Vernon implies. The machine "sgi" (a.k.a. sgi.com, sgi.sgi.com, & sgi.uucp) is a firewall; it actually knows very little about SGI machines other than specific internal mail relays. Thus while a conflict *is* resolved the way Vernon says, the *chance* of a conflict is minimized, since most local machines are not in fact directly visible to "sgi". For example, my machine at home is named "redwood" (a.k.a. "redwood.uucp", registered in the UUCP maps long before I came to work for SGI). There is also an internal machine "redwood" (a.k.a. redwood.wpd.sgi.com). Anywhere on the internal net, mail to "user@redwood" will go to the internal machine. On "sgi", mail to "user@redwood" will go to my home machine (as it should, since "sgi" advertises that in the UUCP maps), and mail to "user@redwood.wpd.sgi.com" will go to the internal machine. It works. -Rob ----- Rob Warnock, MS-1L/515 rpw3@sgi.com rpw3@pei.com Silicon Graphics, Inc. (415)335-1673 Protocol Engines, Inc. 2011 N. Shoreline Blvd. Mountain View, CA 94039-7311