554-dmzms99902.na.baesystems.com - Microsoft Community

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getting below error in outlook.

554-dmzms99902.na.baesystems.com

554 access mail system has been rejected due sending mta's poor reputation. if believe failure in error, please contact intended recipient via alternate means.

his message created automatically mail system (ecelerity).

hi,

getting said error mean domain's sending ip address may on block list. sending ip open mail relay.  open relay can allow spammers ability use domain send spam other domains. suggest contact isp or baesystems.com resolve issue.

keep updated if comes can further assist you.



Outlook.com / Email / Sending, receiving, and reading email



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