Mailgun: Sending errors in US

Impact: majorStatus: resolvedStarted 2025-09-12 10:07 UTCResolved 2025-09-12 15:21 UTC (5.3 h)10 updatesSource: stspg.io

Summary

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.

Machine-written from the archived incident (Sol). Check the timeline before relying on it.

Affected components: Email Services - Outbound DeliveryAPIEmail Services - API

Timeline of updates

investigating2025-09-12 10:07 UTC
We are currently investigating reports of sending errors in US regions.
investigating2025-09-12 10:28 UTC
We are continuing to investigate this issue.
investigating2025-09-12 10:49 UTC
We are continuing to investigate this issue.
investigating2025-09-12 11:14 UTC
We are continuing to investigate this issue.
monitoring2025-09-12 12:03 UTC
A fix has been implemented and we are monitoring the results.
identified2025-09-12 12:57 UTC
We are continuing to work to stabilize things at this time. We have no ETA.
identified2025-09-12 13:42 UTC
Error rates are normalizing as we continue to work to fix the issue.
monitoring2025-09-12 13:57 UTC
A fix has been implemented and we are monitoring the results.
monitoring2025-09-12 14:48 UTC
Systems have normalized, we are continuing to monitor for any issues.
resolved2025-09-12 15:21 UTC
All systems are operating normally at this time. Our engineers continue to monitor our systems for any recurrence or new issues.

Rewindex changes for this incident

Major incident: Sending errors in US 2025-09-12 10:07 UTC

Impact, status and times are the vendor’s own, as last archived. View on stspg.io (opens in new tab). Mailgun profile · Recent Mailgun incidents · Markdown · JSON