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Questionable NRD
I have some users that have gotten the following NDR and I am a little confused as to what it means. "There was an SMTP communication problem with the recipient's email server. Please contact your system administrator. <tweety.umpublishing.org #5.5.0 amtp;503 5.5.0 Not accepting any command except QUIT>"
It's that not accecpting any command part that has me confused.
It's that not accecpting any command part that has me confused.
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2 Solutions
That response indicates a problem with the router/server on the receiving end. It could be a router that is hung - the response is pretty non-specific except that it indicates that the router or server is not responding normally to SMTP commands. There's nothing you can do except try to resend the message later, or contact the receiving party some other way. I agree with rstovall that it's unlikely you'd be able to get any more detailed response, even if you increased your logging level.
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Sounds like the receiving organization has a firewall or something other than exchange answering/filtering their inbound SMTP ..
also, you can check the logs .. increase SMTP logging .. but you aren't likely to get much more info than is provided in the NDR