Failed to send email by flow

[Jojo222813]

Hi All, I have created a demo tenant in CDX for developing my apps. When I use send email function in Power Automate, it always failed.

If I use "Create an approval", I can receive the email for approval.

When I use "Send Email (V2)", I will receive bounced email saying the Delivery has failed to these recipients or groups. Like the below pic:

When I use "Send an email notification (V3)", the error as below:

Anyone can help? I really want to test the eamil function before deploying the solution to production.

[v-jefferni · Accepted solution]

Hi @Jojo222813 ,

It seems an issue from Exchange. Please check below link:

https://answers.microsoft.com/en-us/msoffice/forum/all/550-57501-service-unavailable-spam-abuse-dete...

If it doesn't help, please consider open a ticket on M365 admin center:

https://portal.office.com/Adminportal/Home/?#/homepage

Best regards,

Community Support Team _ Jeffer Ni
If this post helps, then please consider Accept it as the solution to help the other members find it.