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ErikVet's avatar
ErikVet
Brass Contributor
Aug 08, 2021

Exchange Online / Relayy suddenly stopped working with error 4.4.3 Temporary server error.

Hello,

 

we have an Relay Connector (IP based) for our OnPremise Systems (e.g. MFP ). Suddenly Emails are not delivered anymore through the Exchange Connector which we used. 

 

The Exchange Online Servers (random of course) senden the following Error message after the FROM Connect:


451 4.4.3 Temporary server error. Please try again later ATTR3.1 [*****************.prod.protection.outlook.com]


Delete and reconfigure the connector does not work. On the Internet their is not much about this error message. 

 

Many Greetings

Erik 

 

    • ErikVet's avatar
      ErikVet
      Brass Contributor
      Thomas,

      yes this was the solution afterwards.
    • ErikVet's avatar
      ErikVet
      Brass Contributor
      Hello,

      thx for the quick reply.

      that's what we did after after eliminating all possibilities on our side. After calling with MS ... they did some "diagnostics" and after that immediately after that it worked again.

      Whatever it was ..... they did not tell us.

      Many Greetings
      Erik

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