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flow send bulk emails, sender got blocked

Hi, we use PowerApps and Flow to create salary slips and email to staff. The emails are sent to each individual staff one by one by MS Flow on the salary payment day. The quantity is about 250 in a month. The emails subjects are the same and contents are almost same either except the values which is related to different staff. The problem is every time after MS Flow sent the emails, the sender’s email account seems to be blocked, can’t send or receive any email. I think most probably outlook server regards them as spam emails and disabled the sender’s email service. Is there any solution to this problem? If this can’t be solved, then it doesn’t make sense to use PowerApps and Flow for such task. Attached is the screen copy of the email from Outlook. Thanks.

Julianemail from outlookemail from outlook

Community Support
Community Support

Hi @Julian21 ,

Does the recipient ( also use Outlook server to send/receive emails?


Basd on the error message that you mentioned, I think this issue may not be related to your own Outlook email.


According to the error message screenshot, it seems to tell that the email sent from your Outlook server could not be received by your recipients (the users you want to send emails to).


Please check if your recipient ( has blocked the email sent from Outlook server on his email provider.


Please check and see if the response within the following articles would help in your scenario:


If you want to get further help in your issue, please consider open a new thread within the Office 365 Community Forum as below:


Best regards,

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.

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