We have a MS Exchange 2003 server that recently started having this problem. Every time we email anyone @compuserve.com we get this NDR withing seconds of sending the message:
Your message did not reach some or all of the intended recipients.
Sent: 4/26/2005 8:32 AM
The following recipient(s) could not be reached:
email@example.com on 4/26/2005 8:33 AM
You do not have permission to send to this recipient. For assistance, contact your system administrator.
<mail.OurDomainName.com #5.7.1 smtp;550 5.7.1 IP address denied-4>
We also have some issues emailing AOL (owner of compuserve), but the NDR doesn't get returned immediately with AOL like it does with Compuserve. AOL's take a few days of trying to send before getting returned.
If you do a Google search for "5.7.1 IP address denied" the ONLY results you will get are about Compuserve! So, what I need is either someone who knows why Compuserve is blocking us from emailing them OR a good contact for Compuserve so we can find out why were being blocked.
I have attempted to call their regular Tech Support line and talked to someone who told me I couldn't speak to tech support unless I was a member and that I should have the member who can't receive email from us call in. Well, ANYONE who is a member won't be able to receive email from us, but the tech didn't care.
At this point, any help you can offer may help. Thanks!