On Mon, Dec 15, 2008 at 10:15:15AM -0600, Sean Carolan wrote:
> exmx1 : Dec 14 05:28:39 exmx1 sendmail[31574]: mBDIYhEa031574: to=<
> customer@xxxxxxxxxxx>, delay=00:00:00, xde
> lay=00:00:00, mailer=esmtp, pri=41874, relay=mail.example.com., dsn=4.0.0,
> stat=Deferred
>
> Unfortunately there is no reason given for the "Deferred" status such as
> "Server unavailable", etc.
>
> Do you have any ideas how I can begin to troubleshoot this?
Hi Sean,
Two suggestions,
#1 - turn your sendmail logging/debugging setting up as high as
it will go for just long enough to capture some of these events.
(then turn it back to its previous setting)
#2 - try using script and then telnet to capture an SMTP session
(Done by hand) with the MTA at the receiving end. This can be a
little tricky and requires a good understanding of how SMTP
transactions are done so you can emulate it by hand.
I would focus on hat the receiving end does when you send it a
length that is > 1 MB.
Jeff Kinz
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