Improve company productivity with a Business Account.Sign Up



Posted on 2006-11-08
Medium Priority
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 1000 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.

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Are you in the migration process of your Exchange to Exchange Online? Be aware of customized solutions developed on the transport role on your old Exchange server. They might not be convertible to Exchange Online!
This article involves a discussion about issues people have when it comes to Client Access in relating to Load Balancing in an Exchange environment which we had ourselves, along with a solution I found to the problem.
This video shows how to quickly and easily deploy an email signature for all users in Office 365 and prevent it from being added to replies and forwards. (the resulting signature is applied on the server level in Exchange Online) The email signat…
Planning to migrate your EDB file(s) to a new or an existing Outlook PST file? This video will guide you how to convert EDB file(s) to PST. Besides this, it also describes, how one can easily search any item(s) from multiple folders or mailboxes…

589 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question