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Re: Sending a '250' acknowledgement.

From: Eivind Olsen (eivindaminor.no)
Date: Mon Feb 02 2004 - 04:05:23 CST

--On 23. januar 2004 11:51 -0800 Rich Shepard <rshepardappl-ecosys.com>
wrote:
> I'll play with tcpdump this weekend and see what I can learn.

If I understand the RFC 2822 correctly it mandates a 10 minute timeout for
the DATA termination (from the final "<CR><LF>.<CR><LF>" to the "250 OK"
message is sent back).

I'd suggest you enable timestamp-options in tcpdump so you can see if it
takes more than 10 minutes to get that "250 OK" message back. If it takes
more than 10 minutes you can blame the recipient. If it gets back in less
than 10 minutes the sender probably doesn't use RFC-compliant
timeout-values.

I believe this is the setting in postfix which tells how long it's waiting
for the "250 OK" message:

vimes# postconf smtp_data_done_timeout
smtp_data_done_timeout = 600s
vimes#

(this is the default value here)

--
Regards / Hilsen
Eivind Olsen
<eivindaminor.no>