Error in processing. 451 4.7.0 Temporary server error. Please try again later. PRX4

pavan kumar 371 Reputation points
2022-04-19T15:15:28.687+00:00

hi,

i am receiving the above error in Exchange 2016 Cu22 for SMTP relay where our internal application is sending an email to external.
not sure what could be the problem. it is intermittent.

any suggestions towards resolution is appreciated.

Thanks in advance.

Exchange | Exchange Server | Management
Exchange | Hybrid management
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