Hi guys,
I have mixed exchange organisation
2 Exch2K7 CAS - both turned off
8 Exch2K7 MBX - all turned off
2 Exch2K7 HT - 1 turned off and 1 running
1 Exch2K7 Edge - running
4 Exch2013 MBX - all running
2 Exch2013 CAS - both running
All mailboxes are on the exchange 2013 MBX servers.
Exchange online protection (EOP) is used to protection incoming mails form the internet
everything runs fine until i decided to remove the legacy servers completely (i will retain legacy edge for a while). First I decided to do an edge subscription btw the legacy edge server and Exch2013 MBX servers and that's where the problem started. Suddenly, i can only send mails to the internet successfully but incoming internet mails are bounced back with the NDR
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Delivery has failed to these recipients or groups:
test07@mydomain.comA problem occurred during the delivery of this message. The mail routing configuration for this recipient may be producing a mail loop. This could be a temporary situation. Please try to resend the message later. If the problem continues, contact your helpdesk and refer them to theDSN code 5.4.6 in Exchange Online article for tips on how they can resolve this issue.
The following organization rejected your message: DB3FFO11FD034.mail.protection.outlook.com.
Diagnostic information for administrators:
Generating server: sterlingbank.com
test07@mydomain.com DB3FFO11FD034.mail.protection.outlook.com Remote Server returned '<DB3FFO11FD034.mail.protection.outlook.com #5.4.6 smtp;554 5.4.6 Hop count exceeded - possible mail loop>'
Original message headers
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From EOP I can see that mails are delivered to the edge server but users dont receive the mails ..I appreciate all the help here ..
Richard
..forever is just a minute away*