5.4.6 smtp;554 5.4.6 Hop count exceeded - possible mail loop

I am getting this NDR error below:

BN1AFFO11FD010.mail.protection.outlook.com #<BN1AFFO11FD010.mail.protection.outlook.com #5.4.6 smtp;554 5.4.6 Hop count exceeded - possible mail loop> #SMTP#


Please advice
claudiamcseAsked:
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SeanConnect With a Mentor System EngineerCommented:
Looks like there is some type of mail look. Could be an outlook rule to froward messages from this address to another address that forwards it and causes a loop. I would try to track down where the loop is.
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