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

Affected components: APIEmail Services - API

Timeline of updates

1. identified2025-07-21 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.

2. monitoring2025-07-22 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.

3. resolved2025-07-22 11:33 UTC

   This incident has been resolved.

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