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

Trello reported a critical incident affecting outbound email, mobile push notifications and support ticket delivery, starting 2025-12-27 04:42 UTC and resolved at 2025-12-27 05:20 UTC (computed duration: 37 min). The postmortem instead places onset at 02:48 UTC, citing expired monitoring TLS certificates that disrupted metrics traffic; core Jira and Confluence remained available.