Re: [exim] Strange error between exim and exchange

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Autor: Jeremy Harris
Datum:  
To: exim-users @ exim. org
Betreff: Re: [exim] Strange error between exim and exchange
Patrick von der Hagen wrote:
> The exchange-log says:
>  12:47:25           15 -          220 smtp-greeting
>  12:47:25           15 EHLO       Exchange
>  12:47:25           15 -          250-smtp
>  12:47:25           15 MAIL       FROM:<somone@somewhere> SIZE=1934
>  12:47:25           15 -          250 OK
>  12:47:25           15 RCPT       TO:<destination@???>
>  12:47:25           15 -          250 Accepted
>  12:47:25           15 DATA       -
>  12:47:25           15 -          354 Enter message
>  12:47:25          640 -          250 OK id=1DM1sb-0001i6-Ae
>  12:47:25          703 RSET       -
>  12:47:25          703 -          250 Reset OK
>  12:47:25          703 MAIL       FROM:<someone.else@somwhere> SIZE=6211
>  12:47:25          703 -          250 OK
>  12:47:25          703 RCPT       TO:<one@???>
>  12:47:25          703 RCPT       TO:<two@???>
>  12:47:25          703 RCPT       TO:<three@???>
>  12:47:25          703 RCPT       TO:<four@???>
>  12:47:25          703 -          250 Accepted
>  12:47:25          703 DATA       -
>  12:47:25          703 -          354 Enter message
>  12:52:25       300703 -          421 smtp
>  12:52:25       300718 QUIT       -

>
> (first colum timestamp, second column seems to be ms since start of
> connection, third column the commands sent by exchange, 4th column the
> replies).
>
> The second message is probably transfered completely, but either
> exchange fails to terminate it correctly or Exim fails to react to the
> completion... The exchange-log won't tell us.
>
> However, there is still an exim logfile:
> 2005-04-14 12:47:25 1DM1sb-0001i6-Ae <= someone@somewhere
> H=rzms-ex3.rz.uni-karlsruhe.de [172.21.63.166] P=esmtp S=2074
> id=F540278AB4DF944D9263CD0F2D9EE13A0BD7FF@???
> from <Andre.Richter@???> for destination@???
> 2005-04-14 12:47:27 1DM1sb-0001i6-Ae fastreklama.ru [216.74.90.3]:
> Connection reset by peer
> 2005-04-14 12:47:28 1DM1sb-0001i6-Ae == destination@???
> R=domain_dns T=smtp_out defer (104): Connection reset by peer:
> fastreklama.ru [216.74.90.3]
>
> I don't find ANY reference for the second email in my exim-logs. I did
> not try to run a tcpdump (yet), because there is quite some traffic on
> my smarthost, but since exim does not write any indication to its
> logfiles, that it as ever seen a message or that a connection has been
> reset or a connection suffered a timeout, I suspect there might be a bug
> in exim somehow concerning the RSET.


It certainly never *accepted* the second mail, hence the lack of
a "<=" line for it.

Ideas:

- add smtp_protocol_error and smtp_syntax_error to your log_selector
- can you get a packet-level trace of such a conversation? Tcpdump
lets you filter by IP.
- is pipelineing offered by exim? Try turning it off
(pipelining_advertise_hosts)
- can you run a conversation like this into exim in debug-mode,
and capture the console output?

- Jeremy