Errror send mail v2 from different account

[ciprianpopovici]

I have a flow thart run from a general service account, and i need to send emails from the user who created the list item. So i add the users who are created items in exchange the rights to Send as and Send on Behalf for this service account. Unfortunately it;s not working i received this message when i try to run the flow.

You are not authorized to send mail on behalf of the specified sending account.
clientRequestId: 478a84c3-4ca7-451d-83fa-1f1bf9ffba6a
serviceRequestId: ce093fe9-0efa-f457-d5b7-8a993a45ca7f

[v-bofeng-msft · Accepted solution]

Hi  @ciprianpopovici :

As the error says "You are not authorized to send mail on behalf of the specified sending account". The point is that ‘if you want to send emails as someone then you need 'Send As' and 'Send on behalf' permission for this email address’.

Suppose the connection in "Send an email (V2)" is of Bof777. And you need to send email on behalf of Test2.

Bof777 should should have 'Send on behalf' and 'Send as' permission on Test2 Mailbox.

Steps :

Go To exchange Admin Center

Click on MailBoxes from the left navigation

Click on the Test2 (it will open Test2 Mailbox settings in callout menu) 

click on Manage mailbox delegation

Click on Edit for the 'Send as' and 'Send on behalf' permissions

Add the Bof777 here. 

Once these settings are configured, Bof777 will have permissions to send email on behalf of Test2 

Best Regards,

Bof