From: Andreas Winkelmann (mlawinkelmann.de)
Date: Mon Jul 02 2007 - 00:25:25 CDT

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On Monday 02 July 2007 06:51, Dean Manners wrote:

> As a server receiving client connections from another
> network, I am seeing "timeout after DATA" errors. The problem seems to be
> isolated to one particular mail network, so Im _fairly_ confident that my
> systems are koshure.
> Using debug_peer_list I have scoured through debug output and can see that
> we are receiving no "." to end the DATA phase from this mail network.

Maybe a MTU-Issue, maybe a Cisco-Pix or another Router which tries to fixup
SMTP. If you can, then make a telnet from the other Network to your Server
and look at the Output you see. Compare this to the Output you see from a
localhost-localhost Connection. Check MTU-Sizes.

> What I would like to clarify is some of the timeout settings.. Being a
> server side connection I was under the impression that the entire
> connection was bound by the smtpd_timeout parameter? And not the specific
> smtp_data_xxxx_timeout settings.
>
> -------
> # postconf | grep smtpd_timeout
> smtpd_timeout = 300s
> -------

Show "postconf -n"

> However I am seeing these timeout messages sometimes only 30 seconds after
> the intitial smtpd connection, not 5 minutes:
>
> -------
> Jul 2 12:43:55 mailfilter02 postfix/smtpd[13386]: >
> relay01.mail-hub.dodo.com.au[203.220.32.149]: 354 End data with
> <CR><LF>.<CR><LF>
> Jul 2 12:44:26 mailfilter02 postfix/smtpd[15545]: >
> relay01.mail-hub.dodo.com.au[203.220.32.149]: 421 4.4.2
> mailfilter02.ispone.net.au Error: timeout exceeded
> -------

Please have a look at the Process-IDs, these are diffrent connections.

--
        Andreas

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