# Mailgun change history Filter: kind=all. Query: `?kind=notable|all|pages|pricing|trust|legal|incident|incident_edit|incident_deleted|incident_update&history=&page=N`. Company profile: [Mailgun](https://rewindex.com/company/mailgun.md) ## Changes by kind | Kind | Changes | Notable | Latest (UTC) | | --- | --- | --- | --- | | Major incident | 15 | 15 | 2026-09-04 14:16 UTC | ## Timeline | When (UTC) | Kind | Change | Label | Summary | | --- | --- | --- | --- | --- | | 2026-09-04 14:16 UTC | Major incident | [Critical incident: EU Messaging Outage](https://rewindex.com/change/ib792a033f6e584.md) | outage | Mailgun reported a critical EU messaging outage affecting API, SMTP, inbound email processing, outbound delivery, events and logs, and stats and analytics. It started at 2026-09-04 14:16 UTC and was resolved at 2026-09-04 14:33 UTC, lasting 17 min; a fix was implemented by 09-04 14:21 UTC. | | 2026-08-27 20:38 UTC | Major incident | [Critical incident: EU Messaging Outage](https://rewindex.com/change/i09420eb8040b83.md) | outage | Mailgun reported a critical EU datacenter messaging outage affecting API, SMTP, inbound processing, outbound delivery, events and logs, analytics, and the control panel. It started at 2026-08-27 20:38 UTC and resolved at 2026-08-27 21:16 UTC, lasting 37 min. Mailgun implemented a fix but did not specify the cause. | | 2026-08-11 05:32 UTC | Major incident | [Major incident: Click and Open Tracking Degraded (US Regions)](https://rewindex.com/change/if1ddedb11d1e67.md) | security | Mailgun reported a major denial-of-service attack against click and open tracking servers in US regions, causing some requests to time out or fail. The incident started at 2026-08-11 05:32 UTC and was resolved at 2026-08-11 07:07 UTC, lasting 1 h 35 min; a fix was implemented by 06:54 UTC. | | 2026-07-13 18:23 UTC | Major incident | [Critical incident: US Email Validation 500's and Mailgun Control Panel Unavailable](https://rewindex.com/change/i74bbe78c19b49b.md) | outage | Mailgun reported a critical incident involving US Email Validation 500 errors and an unavailable Control Panel, starting 2026-07-13 18:23 UTC and resolved at 2026-07-13 19:56 UTC (1 h 32 min). A fix was implemented and monitored; no cause was stated. | | 2026-07-10 18:07 UTC | Major incident | [Major incident: Mailgun Control Panel Unavailable For Some Users](https://rewindex.com/change/i0309f224143ba4.md) | outage | Mailgun reported a major incident making the Control Panel unavailable for some users, with Email Validation also listed as affected. It started at 2026-07-10 18:07 UTC and resolved at 2026-07-10 20:11 UTC, lasting 2 h 3 min; Mailgun rolled out a fix to impacted regions. | | 2026-05-25 12:18 UTC | Major incident | [Critical incident: Delayed sending in EU](https://rewindex.com/change/i7e26dc935bbca9.md) | degradation | Mailgun reported critical delayed sending in the EU affecting API and Outbound Delivery services, starting 2026-05-25 12:18 UTC and resolved at 2026-05-25 15:55 UTC, with a reported duration of 3 h 36 min. A fix was implemented and monitored; no cause was stated. | | 2026-04-15 13:40 UTC | Major incident | [Major incident: TLS Certificate Validation Errors for Clients Without SNI](https://rewindex.com/change/i14e0c0646cb538.md) | outage | Mailgun reported a major API incident: HTTPS clients without Server Name Indication (SNI) received an expired SSL/TLS certificate, causing certificate validation failures. It started at 2026-04-15 13:40 UTC and was resolved at 2026-04-15 15:34 UTC, lasting 1 h 54 min; a fix was implemented at 04-15 14:02 UTC. | | 2026-03-19 18:43 UTC | Major incident | [Major incident: Elevated 401 errors in US Region](https://rewindex.com/change/i38dbf4997c92d8.md) | outage | Mailgun reported a major incident affecting API and Email Services - API in the US region, where some requests incorrectly failed with 401 errors. It started at 2026-03-19 18:43 UTC and lasted 10 min, resolving at 2026-03-19 18:53 UTC after a fix was deployed and systems returned to normal. | | 2026-03-13 11:29 UTC | Major incident | [Major incident: Intermittent API Errors in US Region](https://rewindex.com/change/ic0a845b2639012.md) | degradation | Mailgun reported a major degradation involving intermittent API errors in the US Region, affecting API and Email Services - API. It started at 2026-03-13 11:29 UTC and lasted 1 h 20 min, resolving at 2026-03-13 12:49 UTC after a fix was implemented; no cause was stated. | | 2026-02-25 19:10 UTC | Major incident | [Major incident: Intermittent Email Validation Errors](https://rewindex.com/change/i682e20e541b66b.md) | degradation | Mailgun reported intermittent email validation errors with major impact affecting API and Email Validation components from 2026-02-25 19:10 UTC to 2026-02-25 21:45 UTC, lasting 2 h 35 min. A fix was implemented by 02-25 21:36 UTC, and the incident was resolved. | | 2025-09-12 10:07 UTC | Major incident | [Major incident: Sending errors in US](https://rewindex.com/change/i324c79f5257633.md) | outage | Mailgun reported a major incident causing sending errors in US regions, affecting API, Email Services - API, and Email Services - Outbound Delivery. It began at 2025-09-12 10:07 UTC and was resolved at 2025-09-12 15:21 UTC, lasting 5 h 14 min. A fix was implemented, and all systems were operating normally at resolution. | | 2025-09-11 22:56 UTC | Major incident | [Major incident: Email Validation 500s](https://rewindex.com/change/idffad9ded1d339.md) | outage | Mailgun reported a major incident causing Email Validation 500 errors, affecting Deliverability Services - Email Validation and Email Validation. It started at 2025-09-11 22:56 UTC and was resolved at 2025-09-12 02:19 UTC, lasting 3 h 23 min; a fix was implemented and monitored before resolution. | | 2025-05-14 18:38 UTC | Major incident | [Critical incident: Intermittent API Errors](https://rewindex.com/change/i9c3a65834d1291.md) | degradation | Mailgun reported critical intermittent API errors affecting API, Control Panel, Email Validation and SMTP, starting 2025-05-14 18:38 UTC and resolving 2025-05-14 22:18 UTC after 3 h 40 min. Mailgun identified a routing issue in its internal service mesh and deployed a fix. | | 2025-03-17 09:20 UTC | Major incident | [Major incident: Errors connecting to smtp.eu.mailgun.org](https://rewindex.com/change/i4ce9158ecc1943.md) | outage | Mailgun reported a major outage involving connection errors to smtp.eu.mailgun.org, starting 2025-03-17 09:20 UTC and resolved 2025-03-17 19:44 UTC, lasting 10 h 24 min. A mitigation restored SMTP and inbound email processing in the EU region to full working behavior at 15:02 UTC. | | 2024-08-17 17:35 UTC | Major incident | [Major incident: Intermittent errors for login.mailgun.com and app.mailgun.com](https://rewindex.com/change/i7fbbebb0fbab5d.md) | outage | Mailgun reported a major incident causing intermittent errors at login.mailgun.com and app.mailgun.com, affecting Control Panel and Customer Tools - Control Panel. It started at 2024-08-17 17:35 UTC and lasted 22 min, resolving at 2024-08-17 17:57 UTC; a fix was implemented at 17:52 UTC. | --- Canonical: https://rewindex.com/company/mailgun/changes · Markdown: https://rewindex.com/company/mailgun/changes.md · JSON: https://rewindex.com/api/v1/companies/mailgun/changes · Generated 2026-10-18T02:31:23.681Z