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Anonymous
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New Error: Outlook Send Email - "Send as" - 403 Forbidden

I have a basic email flow that quit working last week.

 

Error says I am not autohrized to send email on behalf of the account. I have permission to "Read/manage", "send as", and "send on behalf".

 

Capture1111.PNGCapture1112.PNG

 

Anyone know how to fix this other than removing the "Send as" email so the reports come from my email?

 

Thank you,

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Advocate III
Advocate III

Re: New Error: Outlook Send Email - "Send as" - 403 Forbidden

Thanks for this info - we had a Flow with an email address not followed by a semi-colon that was succeeding until earlier this month - it suddenly started failing. I added the semi-colon and now it works again. Strange that it worked before, but glad it is working now. 🙂

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Community Support
Community Support

Re: New Error: Outlook Send Email - "Send as" - 403 Forbidden

Hi @Anonymous,

 

Could you please share a screenshot of your flow's configuration?

Do you want to send emails on behalf of other mailbox using the "Send an email" action?

 

The error message told that your account that you use to create a connection to the "Send an email" action is not authorized to send mail on behalf of the specified sending account within your "Send an email" action. 

 

I have made a test on my side and don't have the issue that you mentioned. My flow's configuration as below:21.JPG

Note: Within "From (Send as)" field, type the email address that you want to send on behalf of and ends with a semicolon (;).

 

The flow works successfully as below:22.JPG

 

Please check if your email address account (that you use to create a connection to the "Send an email" action) has been assigned "Send as" or "Send on behalf of" permission to the specific email address that you filled within the From (Send as) field.

 

In addition, please check if the email address that you filled within the From (Send as) field ends with a semicolon (;). 

 

The user @Kcronic has faced same issue with you, please check the following thread:

https://powerusers.microsoft.com/t5/Using-Flows/Having-and-issue-with-the-error-quot-You-are-not-authorized-to/m-p/91524/highlight/true#M2513

 

More details about sending an email on behalf of another user, please check the following article:

https://support.office.com/en-us/article/give-mailbox-permissions-to-another-user-in-office-365-admin-help-1dbcf12f-a9de-4d1d-b0b3-a227f8a736d8#bkmk_sendbehalflanotheruser

 

 

Best regards,

Kris

Community Support Team _ Kris Dai
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
Highlighted
Advocate III
Advocate III

Re: New Error: Outlook Send Email - "Send as" - 403 Forbidden

Thanks for this info - we had a Flow with an email address not followed by a semi-colon that was succeeding until earlier this month - it suddenly started failing. I added the semi-colon and now it works again. Strange that it worked before, but glad it is working now. 🙂

View solution in original post

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New Member

Re: New Error: Outlook Send Email - "Send as" - 403 Forbidden

This solution work, very helpful cause I get same problem when send email from PowerApps form only miss semicolon ";"

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