PantherList Email delivery issues – July 16, 2026

Starting around 8am on July 16, 2026, PantherList Emails to uwm.edu recipients are being blocked by Microsoft filters. Efforts are underway to unblock these messages and setup allowances to stop the email blocking behavior.

Some individuals may not be receiving emails from PantherLists. Technical staff are working to discover and resolve the issue.

07/16/2026 3:10 PM - A “Severity A” ticket was opened by UWM technical staff with Microsoft.

07/16/2026 5:00 PM - New messages remain blocked by Microsoft’s high-confidence phishing detection. Microsoft Product Group is actively engaged in troubleshooting the issue. Until a permanent fix is identified, staff will continue performing hourly remediation efforts to manually deliver PantherList emails.

07/16/2026 7:45 PM - Microsoft Support implemented a fix for the false-positive high-confidence phishing detections impacting PantherList messages to internal uwm.edu recipients. Message delivery resumed around 6:40 PM, and technical staff testing confirmed successful delivery. All previously blocked messages have been remediated and should now be delivered. Staff will continue to monitor the situation and follow up with Microsoft to prevent recurrence.