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- Xref: sparky comp.mail.misc:4072 comp.mail.uucp:2403
- Path: sparky!uunet!haven.umd.edu!darwin.sura.net!gatech!emory!kd4nc!vdbsan!willard!dawson
- From: dawson@willard.UUCP (Willard Dawson)
- Newsgroups: comp.mail.misc,comp.mail.uucp
- Subject: Re: Mixed format addresses
- Message-ID: <V1L9VB3w165w@willard.UUCP>
- Date: Wed, 23 Dec 92 08:30:06 EST
- References: <saw1Htccib@atlantis.psu.edu>
- Organization: Willard's House BBS, Atlanta, GA -- +1 (404) 664 8814
- Lines: 63
-
- barr@pop.psu.edu (David Barr) writes:
-
- > In article <1992Dec19.163210.12770@becker.GTS.ORG> uucpadm@becker.gts.org wri
- > > It seems logical for sites which are Internet/UUCP
- > > gateways to declare MX records for all the systems
- > > that they publish in their pathalias map entries -
- > >
- > >
- > > sitex.uucp. MX 10 mail.mysys.mydom.
- > > sitey.uucp. MX 10 mail.mysys.mydom.
- > > ...
- > >
- > > I know we don't do this at my workplace, but there
- > > seems no obvious reason not to do so.
- >
- > Most mailers are configured by default to not do DNS lookups on
- > certain specified domains. (Most notably .UUCP, .BITNET, and the
- > now-gone .CSNET) This is to save undue wear-and tear on the root
- > nameservers.
-
- Yes, but... I've come across more than a few mailers that (incorrectly)
- attempt to do DNS lookup on .UUCP sites. I've had several direct exper-
- iences with failed mail in exactly this scenario.
-
- > Even if this were not so, with DNS there's no way for one site
- > to just "declare MX records" for .UUCP and have them be seen by just
- > anyone. _One_ site has to be declared as "authoratative" for entire
- > .UUCP pseudo-domain in order for anything to work consistently. How is
- > my mailer going to know what nameserver to look at to resolve the MX
- > for "becker.UUCP"?
-
- Hmmm... some site would need to advertise itself as a top-level server
- for .UUCP? Not likely, not for free? Or is it really all that big a
- deal? Has any site actually ~tried~ it, to show what the results would
- be? Could the MX record on a given site still be made to point to the
- true best path to the UUCP-connected site?
-
- For example, suppose UUNET declared itself the top-level server (and,
- thus, only server, as .UUCP is not sub-domain-ized <ick>) for .UUCP.
- If the MX record for willard.UUCP were to indicate a path of
- gatech.edu!vdbsan!willard!%s, or something similar, would that not still
- route mail in the exact same way that UUNET would route mail otherwise?
-
- Mail would not need to be sent to UUNET in order to see that the route
- to willard.UUCP would best be through the indicated path. So, a tighter
- link between MX/pathalias would not be necessarily a bad thing, unless
- the resulting load on the system acting as the nameserver were such that
- it would in fact be inpractical to implement.
-
- What have I overlooked?
-
- >
- > --Dave
- > --
- > System Administrator, Population Research Institute barr@pop.psu.edu
- > What if there was no such thing as a hypothetical question?
-
-
- --
- dawson@willard.UUCP (Willard Dawson)
- gatech!vdbsan!willard!dawson
- emory!uumind!willard!dawson
- Willard's House BBS, Atlanta, GA -- +1 (404) 664 8814
-