On-premise are not receiving email

%3CLINGO-SUB%20id%3D%22lingo-sub-1202136%22%20slang%3D%22en-US%22%3EOn-premise%20are%20not%20receiving%20email%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-1202136%22%20slang%3D%22en-US%22%3E%3CP%3E%3CSPAN%3EWe%20are%20running%20Hybird%20environment%20and%20since%20few%20days%20on-premise%20are%20not%20receiving%26nbsp%3Bemail%20or%20would%20receive%20late%20like%20after%20hour%20or%20so.%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSPAN%3EI%20sent%20one%20email%20from%20office%20365%20user%20to%20on-premise%20user%20and%20run%20a%20message%20trace%20and%20found%20status%20pending%20and%20below%20error%3A%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSPAN%3EFQDN%20and%20Traget%20IP%20is%20replaced%20won%20below%20error%3A%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSPAN%3EReason%3A%20%5B%7BLED%3D451%204.7.0%20Temporary%20server%20error.%20Please%20try%20again%20later.%20PRX5%20%7D%3B%7BMSG%3D%7D%3B%7BFQDN%3Dabc.ca%7D%3B%7BIP%3D0.0.0.0%7D%3B%7BLRT%3D2%2F29%2F2020%204%3A13%3A41%20AM%7D%5D.%20OutboundProxyTargetIP%3A%200.0.0.0.%20OutboundProxyTargetHostName%3A%20abc.ca%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSPAN%3EAny%20suggestions%3F%20thank%20you%20in%20advance!%3C%2FSPAN%3E%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-1202136%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3EExchange%20Server%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EHybrid%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E%3CLINGO-SUB%20id%3D%22lingo-sub-1202488%22%20slang%3D%22en-US%22%3ERe%3A%20On-premise%20are%20not%20receiving%20email%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-1202488%22%20slang%3D%22en-US%22%3Ehow%20did%20you%20setup%20your%20environment%2C%20did%20you%20setup%20using%20HCW%20%3F%20are%20there%20any%20firewall%2C%20are%20the%20ports%20open%3F%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-1203365%22%20slang%3D%22en-US%22%3ERe%3A%20On-premise%20are%20not%20receiving%20email%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-1203365%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F65764%22%20target%3D%22_blank%22%3E%40Adnan%20Rafique%3C%2FA%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EYes%20we%20did%20setup%20through%20HCW.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EWhen%20messages%20sent%20it%20shows%20pending%20in%20message%20trace%20and%20give%20the%20below%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EIt%20would%20be%20send%20if%20failed%20then%20would%20get%20a%20below%20error%3A%20original%20domain%20name%20has%20been%20replaced%20with%20abc.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSPAN%3EReason%3A%20%5B%7BLED%3D554%205.4.14%20Hop%20count%20exceeded%20-%20possible%20mail%20loop%20ATTR34%20%5BQB1CAN01FT015.eop-CAN01.prod.protection.outlook.com%5D%7D%3B%7BMSG%3D%7D%3B%7BFQDN%3Dabc-ca.mail.protection.outlook.com%7D%3B%7BIP%3D104.47.60.36%7D%3B%7BLRT%3D2%2F29%2F2020%205%3A16%3A28%20AM%7D%5D.%20OutboundProxyTargetIP%3A%20104.47.60.36.%20OutboundProxyTargetHostName%3A%20abc-ca.mail.protection.outlook.com%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSPAN%3EIn%20O365%20outbound%20connector%20i%20have%20included%20on-premise%20exchange%20FQDN%20and%20our%20default%20domain.%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSPAN%3EShould%20we%20removed%20default%20domain%3F%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSPAN%3EThanks%2C%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-1203891%22%20slang%3D%22en-US%22%3ERe%3A%20On-premise%20are%20not%20receiving%20email%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-1203891%22%20slang%3D%22en-US%22%3EHello%20Yousuf%20khan%2C%3CBR%20%2F%3EI%20hope%20you%20validated%20the%20connector%20successfully.%20Just%20issue%20might%20be%20with%20Looping%20the%20mail%20from%20o365%20to%20On-premises.%20Check%20with%20your%20Default%20Accepted%20Domain%20and%20keep%20domain%20type%20as%20Relay.%20Hope%20this%20will%20solve%20your%20problem.%3C%2FLINGO-BODY%3E
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Occasional Contributor

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
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how did you setup your environment, did you setup using HCW ? are there any firewall, are the ports open?
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@Adnan Rafique 

 

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,

 

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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.