Forum Discussion
On-premise are not receiving email
We are running Hybird environment and since few days on-premise users are not receiving email or would receive late like after hour or so.
I sent one email from office 365 user to on-premise user and run a message trace and found status pending and below error:
Original FQDN and Traget IP is removed from the below error.
Reason: [{LED=451 4.7.0 Temporary server error. Please try again later. PRX5 };{MSG=};{FQDN=abc.ca};{IP=0.0.0.0};{LRT=2/29/2020 4:13:41 AM}]. OutboundProxyTargetIP: 0.0.0.0. OutboundProxyTargetHostName: abc.ca
Any suggestions? thank you in advance!
3 Replies
- how did you setup your environment, did you setup using HCW ? are there any firewall, are the ports open?
Yes we did setup through HCW.
When messages sent it shows pending in message trace and give the below
It would be send if failed then would get a below error: original domain name has been replaced with abc.
Reason: [{LED=554 5.4.14 Hop count exceeded - possible mail loop ATTR34 [QB1CAN01FT015.eop-CAN01.prod.protection.outlook.com]};{MSG=};{FQDN=abc-ca.mail.protection.outlook.com};{IP=104.47.60.36};{LRT=2/29/2020 5:16:28 AM}]. OutboundProxyTargetIP: 104.47.60.36. OutboundProxyTargetHostName: abc-ca.mail.protection.outlook.com
In O365 outbound connector i have included on-premise exchange FQDN and our default domain.
Should we removed default domain?
Thanks,
- Hello Yousuf khan,
I hope you validated the connector successfully. Just issue might be with Looping the mail from o365 to On-premises. Check with your Default Accepted Domain and keep domain type as Relay. Hope this will solve your problem.
