Answered

Sending email as From (Send as) issue

(1) Share

Report

Posted on by JohnWeb

Hi,

I have created an MS Flow that is fired through PowerApps, the flow sends email to a recepient (this is a field in the form). Here's the email in the flow. The connection and email action is using the connection run by service account that is in the From (Send As). The service account is licensed and configured with Mailbox and enabled Send As. However flow is having this error when sending email. Any idea?

Here's the error:

You don’t have permissions to send emails on behalf of the specified sending account. Contact the account owner to check shared mailbox permissions and gain access.

Categories:

General topics

I have the same question (0)

All responses (25)

Answers (2)

Sort by

Verified answer

Pstork1 69,226 Most Valuable Professional on at

Like (3)

Report
Copy link

Link copied!

When you initiate a Flow from inside PowerApps the Flow runs in the context of the user running PowerApps. To use the From field in the email the person running the Flow must have SendAs authority for the mailbox listed in the From field. That means anyone who runs the PowerApp has to have SendAs permission to the Service Account's mailbox. I assume they don't and that is why you are getting the error.

Was this reply helpful? Yes No
JohnWeb 52 on at

Like (1)

Report
Copy link

Link copied!

@Pstork1 thanks for the insight. As work around I created a new flow that sends email and have it called by the original flow.

Was this reply helpful? Yes No
Pstork1 69,226 Most Valuable Professional on at

Like (2)

Report
Copy link

Link copied!

Since that second Flow runs in the context of the Maker (hopfully the service account) you will be able to send with minimal permissions. The only issue tends to be that calling a second Flow via HTTP is a premium function so licensing could get expensive unless you are on Dynamics licensing already.

Was this reply helpful? Yes No
JohnWeb 52 on at

Like (1)

Report
Copy link

Link copied!

I thought about that premium license (the powerapps is company wide use by all users) does that mean every user would require premium license? Or is just service account?

Was this reply helpful? Yes No
Pstork1 69,226 Most Valuable Professional on at

Like (2)

Report
Copy link

Link copied!

Since its the first Flow, being run in the context of the user who pushed the button, that is making the HTTP call to invoke the second Flow each user would be required to have a Premium license.

Was this reply helpful? Yes No
Verified answer

JohnWeb 52 on at

Like (2)

Report
Copy link

Link copied!

As another work around I created a list that stores the item that was added/updated from PowerApps list then created a Flow to send the email and that seems to been working fine.

Was this reply helpful? Yes No
faymos 4 on at

Like (1)

Report
Copy link

Link copied!

@Pstork1 I'm having the same issue, the send as and send on behalf permission had been assigned to the email account used for the flow, but am still getting forbidden

Was this reply helpful? Yes No
Pstork1 69,226 Most Valuable Professional on at

Like (1)

Report
Copy link

Link copied!

1) What Trigger is the flow using? If its a manual trigger or a selected item trigger, then the flow is running under the account of the person who starts it, not the maker. In that case everyone who runs the flow would need that permission.

2) Is the mailbox being used as the From account a regular mailbox? It won't work with a shared mailbox.

Was this reply helpful? Yes No
VictorIvanidze 13,081 on at

Like (1)

Report
Copy link

Link copied!

Hi @Pstork1,
you said:
>2) Is the mailbox being used as the From account a regular mailbox? It won't work with a shared mailbox.
In fact it works when I populate the "From (Send as)" field with a shared mailbox.

Was this reply helpful? Yes No
ikarthik Microsoft Employee on at

Like (1)

Report
Copy link

Link copied!

Hi JohnWeb, Im also facing a similar issue, I need an automate flow to trigger an email from a common email box to a larger group of audience, since the email address "From (Send as)" in power automate requires "Send As" or "Send on behalf of" permission for that mailbox and I'm not sure whether its is possible to share permission to all audience at one go..

Could you please help me to understand how did you resolved it?

Was this reply helpful? Yes No