On Sat, Oct 11, 2008 at 12:04:22AM -0400, Sahil Tandon wrote:
> This afternoon a user complained about missing email and mentioned that
> the sender "is not getting a bounce". In the logs I see several
> iterations of:
>
> Oct 10 09:51:42 aegis postfix/smtpd[52803]: timeout after DATA (256605 bytes)
> from relay.airtiger.com[63.170.171.120]
> Oct 10 10:09:56 aegis postfix/smtpd[53022]: timeout after DATA (3240605
> bytes) from relay.airtiger.com[63.170.171.120]
> Oct 10 11:09:36 aegis postfix/smtpd[53463]: timeout after DATA (2998025
> bytes) from relay.airtiger.com[63.170.171.120]
With so much DATA sent, it seems unlikely that this is an MTU issue. Perhaps
the remote server gives up after a fixed amount of time? Perhaps there is
an issue with SMTP "transparency", or a TLS implementation bug? You need
to tcpdump the session (full packet capture) and see what happens just before
the connection is lost...
--
Viktor.
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