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duplicate messages on IETF mailing lists

2001-07-26 01:40:03
A number of messages sent to various IETF mailing lists have arrived
in multiple copies.  One such message (just an example that I received
five times) is 
<200107251753(_dot_)NAA18284(_at_)astro(_dot_)cs(_dot_)utk(_dot_)edu>.

According to Received lines, this message was received once by
astro.cs.utk.edu with an internal id of NAA18284 on Wed, 25 Jul 2001
13:53:38 -0400 (EDT).  It was then received by odin.ietf.org
with id NAA16715 on Wed, 25 Jul 2001 13:54:01 -0400 (EDT);
with id OAA18788 on Wed, 25 Jul 2001 14:14:11 -0400 (EDT);
with id OAA21900 on Wed, 25 Jul 2001 14:44:11 -0400 (EDT);
with id PAA25476 on Wed, 25 Jul 2001 15:14:10 -0400 (EDT);
with id PAA28761 on Wed, 25 Jul 2001 15:44:13 -0400 (EDT).

It appears that astro.cs.utk.edu has transmitted the message at least
five times, with probably sendmail running with `-q30m' option, the
message was transmitted successfully, but astro.cs.utk.edu didn't
learn about the success at least the first four times.

The only reasonable explanation for this behaviour would be that
odin.ietf.org is in violation of RFC1047 (or that astro is broken,
which is ruled out by the fact that there are numerous messages from
various places sent to various ietf.org lists that arrived in
duplicates and triplicates).  Since odin says it runs Sendmail 8.9.1a,
while in fact that's not what's listening to the incoming SMTP
connections (it looks like smap or some other filter) it's hard to
actually debug anything.

Pure minimal SMTP listener:

$ telnet odin.ietf.org 25
Trying 132.151.1.176...
Connected to odin.ietf.org.
Escape character is '^]'.
220 *********************************2******200**20****0***0*00 *****
EHLO cain
500 Command unrecognized: "XXXX cain"
HELP
500 Command unrecognized: "XXXX"
QUIT
221 ietf.org closing connection
Connection closed by foreign host.

May I suggest installing Postfix or a recent version of Sendmail on
odin.ietf.org?

-- 
Stanislav Shalunov              http://www.internet2.edu/~shalunov/

.signature: I/O Error



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