Receiving emails from a domain

[CBack85]

We are having an issue with one domain that can't send to us. Apparently the message they get back is something along the lines of "No Such User"

I haven't heard anyone else saying they are having issues send emails to us so I am guessing it's most likely on their end? Any suggestions to try to troubleshoot this issue?

 

[58sniper]

Have them send the NDR message to a mailbox outside your org that you can get to (like a GMAIL account). I suspect it's on their end, trying to send to a bad IP address.

Pat Richard MVP
Plan for performance, and capacity takes care of itself. Plan for capacity, and suffer poor performance.

http://www.exchangeblogs.com/

 

[CBack85]

I had them fax me over the NDR message they received.

"There was a SMTP communication problem with the recipient's email server. Please contact your administrator. <mail.theirdomain.com #5.5.0 smtp;550 <Myemailaddress@ourdomain.com> No user user here>

 

[58sniper]

Look in your logs for that particular communication and see if you can see any other errors.

Pat Richard MVP
Plan for performance, and capacity takes care of itself. Plan for capacity, and suffer poor performance.

http://www.exchangeblogs.com/