Skip to content
Mailgun · Apps and SaaSJul 21, 2025, 23:56 UTC

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

MinorNot disclosedUpdated 18h ago
Jul 21, 23:56 UTCJul 22, 11:33 UTC
Duration
11h 37m
Impact
Minor
Root cause
Not disclosed
Mailgun, 90 days
11 incidents
Affected
APIEmail Services - API
Status page

Final update

This incident has been resolved.

Timeline

  1. Resolved · Jul 22, 11:33 UTC
    This incident has been resolved.
  2. Monitoring · Jul 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. Identified · Jul 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.

More from Mailgun

Full history
StartedIncidentDuration
Sep 1409:15 UTCRoute delays in EU Region58m
Sep 414:16 UTCEU Messaging Outage17m
Sep 412:20 UTCMicrosoft Incident Resulting in Delivery Issues to M36534m
Aug 3114:47 UTCEvent Log Delays in US Region7h 14m
Aug 2720:38 UTCEU Messaging Outage37m
Aug 2016:19 UTCGCP Reporting Multi Service Outage in US-West11h 12m

From vendors' own status pages and disclosures. Times as reported. Logos via logo.dev; trademarks belong to their owners.

Weekly: the week's major outages, postmortems and breaches, Saturday mornings.