SharePoint News “Send as email” fails for all dynamic distribution lists
Since September 2, 2026, we can no longer send SharePoint news posts by email to any Exchange Online dynamic distribution list.
What we have tested:
Sending from SharePoint to individual internal mailboxes works.
Sending to static distribution lists fails, including small lists.
Sending to dynamic distribution groups also fails.
SharePoint immediately displays: “Sending email failed.”
Sending the same content manually from Outlook to the same distribution groups works correctly.
This functionality previously worked without issues.
This appears to be specific to SharePoint News “Send as email” when the recipient is a group address. The distribution groups and Exchange mail flow themselves are working.
Is anyone else currently experiencing this? Has Microsoft recently changed group-recipient handling in SharePoint, or could this be a new service regression?