Mailgun outage: Elevated 401 errors in US Region

Affected components

• API

1. resolvedMar 19, 2026, 18:53 UTC

   A fix has been deployed and systems are back to normal.

2. identifiedMar 19, 2026, 18:43 UTC

   Some requests may be incorrectly failing with 401 error codes in our US region.

What APIStatus.watch saw

Our 5-minute checks didn't record a change in Mailgun's overall status around this incident. Smaller or regional incidents often leave a provider's overall status green.

Other services with incidents at the same time

Overlapping incidents aren't necessarily related.

• MongoDB Atlas: Issue querying Azure blob storage containers in Atlas Data FederationMajor · Mar 19, 2026, 18:11 UTC
• LaunchDarkly: Experiment Data Missing for Some Experiment IterationsMinor · Mar 18, 2026, 02:07 UTC
• MongoDB Atlas: MongoDB Atlas for Government: SSO login failures for some usersMinor · Mar 19, 2026, 00:24 UTC

How often does Mailgun have incidents?

Mailgun reported 10 incidents in the last 90 days, 5 of them major or critical. A typical incident lasted 1h 17m. See Mailgun's uptime and incident history