Changes / Mailgun / Sending errors in US

Mailgun: Major incident: Sending errors in US

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 diff below (Sol; type: incident outage). Check the diff before relying on it.

Major incidentLabel: outage (model (Jev), 94%)Changed Detected Source: stspg.io (opens in new tab)

What changed

AddedTitle#1
Before: not present
After: Sending errors in US
AddedImpact#2
Before: not present
After: major
AddedStatus#3
Before: not present
After: resolved
AddedStart time#4
Before: not present
After: 2025-09-12 10:07 UTC
AddedResolved time#5
Before: not present
After: 2025-09-12 15:21 UTC
AddedAffected components#6
Before: not present
After: API, Email Services - API, Email Services - Outbound Delivery
AddedUpdateinvestigating#7
Before: not present
After: We are currently investigating reports of sending errors in US regions.
AddedUpdateinvestigating#8
Before: not present
After: We are continuing to investigate this issue.
AddedUpdateinvestigating#9
Before: not present
After: We are continuing to investigate this issue.
AddedUpdateinvestigating#10
Before: not present
After: We are continuing to investigate this issue.
AddedUpdatemonitoring#11
Before: not present
After: A fix has been implemented and we are monitoring the results.
AddedUpdateidentified#12
Before: not present
After: We are continuing to work to stabilize things at this time. We have no ETA.
AddedUpdateidentified#13
Before: not present
After: Error rates are normalizing as we continue to work to fix the issue.
AddedUpdatemonitoring#14
Before: not present
After: A fix has been implemented and we are monitoring the results.
AddedUpdatemonitoring#15
Before: not present
After: Systems have normalized, we are continuing to monitor for any issues.
AddedUpdateresolved#16
Before: not present
After: All systems are operating normally at this time. Our engineers continue to monitor our systems for any recurrence or new issues.

First version of this incident archived by Rewindex. View the live incident (opens in new tab).

History of this incident

When (UTC)ChangeKind
Major incident: Sending errors in US (this change)
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.
Major incident

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