When trying to send an EMail with the EMail Connector i get the following error: an error occurred in the SendEmail java action : 451 4.7.0 Temporary server error. Please try again later. PRX5 [FR0P281CA0187.DEUP281.PROD.OUTLOOK.COM 2024-02-05T07:06:05.128Z 08DC23B0D35C1AEE]

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Hello fellow coders,    i´m currently trying to send an EMail from my local machine to my own EMail account. I am using the Email Connector and OAuth2 with the Azure Portal as an authorization.    I am getting the following error:  Failed to send an email to: XXXX an error occurred in the SendEmail java action : 451 4.7.0 Temporary server error. Please try again later. PRX5  [FR0P281CA0187.DEUP281.PROD.OUTLOOK.COM 2024-02-05T07:06:05.128Z 08DC23B0D35C1AEE] Stacktrace : com.mendix.systemwideinterfaces.MendixRuntimeException: com.mendix.datahub.connector.email.utils.EmailConnectorException: EC0x043: Error while sending mails.    at com.mendix.basis.actionmanagement.ActionManager.executeSync(ActionManager.scala:84) Caused by:com.mendix.datahub.connector.email.utils.EmailConnectorException: EC0x043: Error while sending mails.    at com.mendix.basis.actionmanagement.ActionManager.executeSync(ActionManager.scala:84) Caused by:EC0x043: Error while sending mails.    at com.mendix.basis.actionmanagement.ActionManager.executeSync(ActionManager.scala:84) Caused by:EC0x043: Error while sending mails.    at com.mendix.basis.actionmanagement.ActionManager.executeSync(ActionManager.scala:84) Caused by:Failed to send email [<367146826.0.1707116763987@md60mnkc.ad001.siemens.net>], reason: Third party error    at com.mendix.basis.actionmanagement.ActionManager.executeSync(ActionManager.scala:84) Caused by:451 4.7.0 Temporary server error. Please try again later. PRX5  [FR0P281CA0187.DEUP281.PROD.OUTLOOK.COM 2024-02-05T07:06:05.128Z 08DC23B0D35C1AEE]     at com.mendix.basis.actionmanagement.ActionManager.executeSync(ActionManager.scala:84)   Does anyone know what is causing this issue?    BR Jan
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Hi Jan,

451 4.7.0 Temporary server error. Please try again later. PRX

seems an Exchange specific error, so I think you have better luck outside the Mendix Forum.

It could have something todo with Time synchronization or DNS settings, but it's hard to say without extra logging.

Maybe you can work-around using the Graph connector and send mails via REST?

I hope this helps a bit!

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