I was investigating a mail bounce and the sender and I investigated several
mailers:
----------------------------------------------------------------------------
> kenny:~# telnet kenny smtp
> Trying 10.1.3.166...
> Connected to kenny.su.valinux.com.
> Escape character is '^]'.
> 220 mail.valinux.com ESMTP Exim 3.16 #1 Wed, 23 Aug 2000 18:29:19 -0700 - VA
mm1
> mail from: merlin@???
> 250 <merlin@???> is syntactically correct
> rcpt to: merlin@???.
> 501 merlin@???.: domain missing or malformed
Most interesting, it appears this is a bug/mis-feature in the submission
software of the original message. Witness sendmail though:
marine[~] $ telnet 0 smtp # sendmail
220 marine.au.int.en-bio.COM ESMTP Sendmail 8.11.0/8.11.0/Debian 8.11.0-1; Thu,
24 Aug 2000 11:41:49 +1000
[snip]
mail from: <akumria@???.>
250 2.1.0 <akumria@???.>... Sender ok
rcpt to: <akumria@???.>
250 2.1.5 <akumria@???.>... Recipient ok
marine[~] $ telnet mail.aphid.net smtp # postfix
220 giardia.yourweb.com.au ESMTP Postfix
[snip]
mail from: <jdub@???.>
250 Ok
rcpt to: <jdub@???.>
250 Ok
marine[~] $ telnet qmail.org smtp # qmail
220 ns.crynwr.com NO UCE ESMTP
[snip]
mail from: <akumria@???.>
250 ok
rcpt to: <postmaster@???.>
553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)
rcpt to: <postmaster@???>
250 ok
----------------------------------------------------------------------------
I know how to tell exim not to check the To: field. I may even be able to do
rewriting at the SMTP level to remove the dot, but the question is should I?
RFC 822 isn't detailled enough to say (the BNF doesn't describe what atom is
supposed to be like)
Marc
--
Microsoft is to software what McDonalds is to gourmet cooking
Home page:
http://marc.merlins.org/ (friendly to non IE browsers)
Finger marc_f@??? for PGP key and other contact information
