Jira change history: Outbound Email, Mobile Push Notifications, and Support Ticket Delivery Impacting All Cloud Products

Jira reported a critical incident affecting outbound email, mobile push notifications, and support ticket delivery across cloud products, recorded from 2025-12-27 04:42 UTC to 2025-12-27 05:20 UTC (37 min). The postmortem reports email and notification failures beginning at 02:48 UTC, triggered by expired monitoring-infrastructure TLS certificates; core Jira and Confluence remained available, and affected services were restored.