Thanks Scott,
I know that page, I have NO ONE rule in the menu you point out
Even if I create one to authorized, nothing always same result, power automate is green, but no email received outside and an error message like this:
Delivery has failed to these recipients or groups:
xxxxter@paxxxxxrt.fr
Your message wasn't delivered because the recipient's email provider rejected it.
I m admin, and I have an other tenant (older one, this one is open in Dec) and no issue with the other ....
I really don't understand........
What do you think ?
Best to you