On Thu, 2 Oct 2025, Scott Q. via mailop wrote:
52.101.41.26 failed after I sent the message. Remote host said: 554 5.4.14 Hop count exceeded - possible mail loop ATTR1 [SJ1PEPF00002313.namprd03.prod.outlook.com 2025-10-01T14:52:23.190Z 08DE008E05DFD276]
I've had a few random delivery failures from O365 in the last couple of weeks with this error message. There's nothing lining up in the logs at the destination so my assumption is there's an internal breakage in there somewhere. It always seems transient and a re-send comes clear.
-- Andre van Eyssen. _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
