Microsoft Outlook and Microsoft 365 email servers are currently experiencing issues receiving emails from external domains. As a result, emails sent from Zone email servers to Microsoft addresses may be delivered later than usual or may result in an error message.
Emails are not permanently rejected. Zone email servers will automatically attempt to resend them.
This is an issue on Microsoft’s side and is affecting email senders more broadly. Microsoft service customers can follow the progress of the incident in the Microsoft 365 admin center.
Microsoft incident ID: EX1467029
