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troubleshooting Question

unable to send email to Bellsouth

Avatar of rauladan
rauladan asked on
2 Comments1 Solution948 ViewsLast Modified:
I have a Small Business server setup with about 23 users. We are able to send email to anyone with the exception of any user at username@bellsouth.net. I have a Reverse DNS setup pointing to our server. I checked the blacklist and we are not blacklisted. The message that I get is similar to this

Could not deliver the message in the time limit specified. Please retry or contact your administrator.
  <anycompany.net #4.4.7>

Any suggestions on how to troubleshoot this issue is greatly appreciated. Also, our ISP is Bellsouth.net, I changed the configuration from DNS to smart host (mail.bellsouth.net) and then no email goes out at all. As soon as I put it back into DNS, all of the email goes out with the exception of pending email to Bellsouth.
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