Mailgun incident: HTTPS Tracking Certificate Creation / Renewal blocked by Let's Encrypt Outage

Affected components

• API

1. resolvedJul 22, 2025, 11:33 UTC

   This incident has been resolved.

2. monitoringJul 22, 2025, 05:22 UTC

   The current status of Let's Encrypt infrastucture is "[Identified] We have deployed mitigations for the failure of our internal DNS servers. Issuance of certificates is now succeeding, though we are still recovering from the resulting high traffic volumes." We are monitoring the situation and will update our status page accordingly.

3. identifiedJul 21, 2025, 23:56 UTC

   Let's Encrypt, the certificate issuer used for creating certificates on customer tracking domains is experiencing an outage (https://letsencrypt.status.io/). Attempting to generate or regenerate a tracking certificate will not succeed until service is restored.

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.

• 1Password: Events API and Reporting DelaysMinor · Jul 21, 2025, 14:57 UTC
• Vimeo: Some users in Pakistan are unable to connect to vimeo.comMinor · Jul 22, 2025, 10:46 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