Share via

(reason: 554 5.4.14 Hop count exceeded - possible mail loop ATTR34 [BL6PEPF0001AB4B.namprd04.prod.outlook.com 2023-10-03T21:41:30.463Z 08DBBB934825FCEA])

Timothy Northrup 0 Reputation points
2023-10-03T22:11:34.97+00:00

user send email to another company. get back this error. 

The original message was received at Tue, 3 Oct 2023 16:41:29 -0500 from m0136267.ppops.net [127.0.0.1]

   ----- The following addresses had permanent fatal errors ----- <******@unl.edu>
    (reason: 554 5.4.14 Hop count exceeded - possible mail loop ATTR34 [BL6PEPF0001AB4B.namprd04.prod.outlook.com 2023-10-03T21:41:30.463Z 08DBBB934825FCEA])

   ----- Transcript of session follows ----- ... while talking to unl-edu.mail.protection.outlook.com.:
>>> DATA
<<< 554 5.4.14 Hop count exceeded - possible mail loop ATTR34 [BL6PEPF0001AB4B.namprd04.prod.outlook.com 2023-10-03T21:41:30.463Z 08DBBB934825FCEA]
554 5.0.0 Service unavailable

im on Microsoft 365 Business Premium with no in house exchange server. read a few how to, everything is pointing to reciving not sending.

Microsoft 365 and Office | Install, redeem, activate | For business | Windows

Your answer

Answers can be marked as Accepted Answers by the question author, which helps users to know the answer solved the author's problem.