Posted on 2006-11-08
Last Modified: 2008-03-17
2 Weeks ago I moved our exchange system to a new server.  At this point in time we are up and running fine with the exception of outgoing mail to AOL and (as far as I know these are the only two) we receive rejection error.

"There was a SMTP communication problem with the recipient's email server. ( #5.50smtp;521-EHLO/HELO from sender does not amp to in DNS" This error comes from

"Could not deliver the message in te time limit specified. Please retry or contact your administrator. ( #4.4.7) this is the error from

Thanks for your help

Question by:lorinorris

Accepted Solution

dynamitedotorg earned 250 total points
ID: 17900558
Check your forward and reverse DNS for starters. points to, however it looks like your SMTP connections are being seen as coming from (apparently that's

Author Comment

ID: 17910642
It was pointing to the wrong server also needed to have reverse lookup added. Problem solved.

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