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 | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

Exchange | Hybrid management
Exchange | Hybrid management

The administration of a hybrid deployment that connects on-premises Exchange Server with Exchange Online, enabling seamless integration and centralized control.

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