On 2012-08-28 1:08 PM, Michael D. Sofka wrote:
On 08/14/2012 12:19 AM, Nathan Findley wrote:
The server in question is returning:
Aug 8 11:52:18 asp sendmail[13710]: q772pt1H016314:
to=<*******@*****.co.jp>, delay=1+00:00:21, xdelay=00:00:00,
mailer=esmtp, pri=129960390, relay=mail.*****.co.jp. [IP], dsn=4.0.0,
stat=Deferred: Connection reset by mail.*****.co.jp.
This deferred error message is new to me. Based on the domain, I have
sent mail to the supposed administrators asking them for help on their
end. They have yet to reply, unfortunately.
Is there anything else I can do?
You might be on the sending end of the Cisco DKIM bug. If the receiving site
is using a Cisco router, the rules to check DKIM in e/smtp may be enabled (they
are by default). The implementation is buggy and will reject some small number
of messages, while allowing others through. The error will be consistent for
the message, but other email from the same MTA and sender is accepted. It does
not appear to have anything to do with message size.
If the message you are sending has DKIM keys, try sending them without. If you
are in contact with the admin, see if they are using Cisco routers, and if the
DKIM rules are enabled.
Mike, that's a most excellent observation|tech tip!
Thanks!
-Ben
--
Ben Kamen - O.D.T., S.P.
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