Split from this thread.
Well this is a mess.
All emails via *prod.protection.outlook.com have been failing for weeks. When will Microsoft actuall y address this?
Users are complaining bitterly, and companies using your service will leave when they realise you are blocking their business.
Escalate this and fix. Please.
This is a delivery failure notification message indicating that
an email you addressed to email address :
-- *** Email address is removed for privacy ***
could not be delivered. The problem appears to be :
-- Recipient email address is possibly incorrect
Additional information follows :
-- 5.4.1 [firstname.lastname@example.org]: Recipient address rejected: Access denied [CWLGBR01FT011.eop-gbr01.prod.protection.outlook.com]
This condition occurred after 1 attempt(s) to deliver over
a period of 0 hour(s).
If you sent the email to multiple recipients, you will receive one
of these messages for each one which failed delivery, otherwise
they have been sent.
<PII is removed to protect your privacy>