Configuration - EBS: MGT, MSG and ISA. Exchange on the MSG, Edge transport on the ISA.
New users did not get email from outside (old ones did). This happened I think after applying exchange service pack to exchange server and Edge on ISA server. Error was "unknown user". Exported subscription from ISA, imported it to MSG and now I get "#554 5.4.4 SMTPSEND.DNS.MxLoopback; DNS records for this domain are configured in a loop ##", when sending email to ANY user. NO ONE can get emails from outside!!!!!
What did I do wrong??
Diagnostic-Code: smtp;554 5.4.4 SMTPSEND.DNS.MxLoopback; DNS records for this domain are configured in a loop