I'm seeing the same email problem across three separate customer tenants. Messages are failing to send or arrive, sometimes with no useful error details, and other times with:…
Is anyone else seeing widespread sending and receiving problems in Exchange Online? I've confirmed the same issue across three unrelated customer tenants. Messages are failing with "550 5.6.200…
Is anyone else having trouble with Outlook or Exchange Online today? Some users here are seeing delayed or failed email, authentication errors, inaccessible webmail, and freezing when using…
Is anyone else unable to send or receive external email through Proofpoint? Our inbound and outbound mail stopped working, and the Proofpoint MX hosts are not resolving to…
I noticed this morning that no email had arrived since around 5 AM Pacific, so I checked MX Guard Dog's website and found a major outage notice. Their…
I noticed this morning that no mail had arrived since around 5 AM Pacific, so I checked MX Guarddog's site and found a major outage notice. Their Phoenix…