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

- Impact (vendor’s label): minor
- Status: resolved
- Started: 2025-07-21 23:56 UTC · Resolved: 2025-07-22 11:33 UTC · Duration: 12 h
- Updates: 3 · Affected components: API, Email Services - API
- [Vendor status page: https://stspg.io/zprl7nv9ll6p](https://stspg.io/zprl7nv9ll6p)
- [Company: Mailgun](https://rewindex.com/company/mailgun.md)

## Timeline of updates

- **identified** 2025-07-21 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.
- **monitoring** 2025-07-22 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.
- **resolved** 2025-07-22 11:33 UTC: This incident has been resolved.


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Canonical: https://rewindex.com/company/mailgun/incidents/g4363fx6lkm9 · Markdown: https://rewindex.com/company/mailgun/incidents/g4363fx6lkm9.md · JSON: https://rewindex.com/api/v1/companies/mailgun/incidents/g4363fx6lkm9 · Generated 2026-10-18T12:41:53.220Z