mail to .at domain

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3 total messages Started by Gunnar Lindberg Fri, 17 Mar 1989 13:40

#3273

Author: Gunnar Lindberg
Date: Fri, 17 Mar 1989 13:40

28 lines
1521 bytes

We've run into an interesting problem: Somebody got a mail from a
user at  "edvz.uni-salzburg.ptt.at" and tried to reply to it.
Note the top level domain, which is registered for Austria with
"uunet.uu.net" and "aos.brl.mil" as NS:s (MX only).

Now, what happened was that we tried to forward it and thus re-wrote
it using "%...@"-syntax (yes I know, it's not "pure RFC822" :-) into:

    "user%edvz.uni-salzburg.ptt.at@kth.se"

Then "sendmail" found the "at" and changed it into an "@" - look at
"sendmail.cf", rule S3:

    R$+ at $+		$1@$2		"at" -> "@" for RFC 822

Guess what happened to "usr%edvz.uni-salzburg.ptt.@@kth.se"...

Those who just said "it's non RFC822" should try "usr@foo.at.bar", :-).

I've tried to just exclude the line from "sendmail.cf" and it seems
to work quite well since "sendmail-5.59" catches "user at domain" in
its argument list and converts it there. What doesn't work is the
"To:" and "Cc:" lines, which will then stay as "usr at domain". I
also guess "-t" doesn't work any more, although I haven't tried it.

Has anybody else seen this? Is there a simple fix to it?

	Gunnar Lindberg

Re: mail to .at domain (fix)

#3274

Author: Gunnar Lindberg
Date: Fri, 17 Mar 1989 15:04

15 lines
878 bytes

In article <2898@fnatte.cs.chalmers.se> I wrote about problems with
"sendmail" parsing "foo.at.bar" (RFC822 says "at" -> "@" :-).

The problem comes from rule S3:

    R$+ at $+		$1@$2		"at" -> "@" for RFC 822

Now, I think I've found a fix:

  + R$*at.$*		$1<@>.$2	save at.foo.bar
  + R$*.at$*		$1.<@>$2	save foo.at.bar
    R$+ at $+		$1@$2		"at" -> "@" for RFC 822
  + R$*<@>$*		$1at$2		restore at.foo.bar/foo.at.bar

	Gunnar Lindberg

Re: mail to .at domain (fix)

#3276

Author: Juergen Wagner
Date: Sat, 18 Mar 1989 09:46

7 lines
818 bytes

I do not see why the 'at' => '@' hack is necessary at all. RFC822 does
not mention anything of that sort. In fact, sendmail.cf as distributed
with 5.61 does not show a rule like the one you mention.

-- 
Juergen Wagner		   			gandalf@csli.stanford.edu
						 wagner@arisia.xerox.com

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