Mailgun outage on November 13, 2025
Nov 13, 02:30 PSTResolved - On November 13th, Mailgun incorrectly rejected a subset of inbound emails with a 550 "recipient rejected" error. Senders received bounce notifications even though delivery should have succeeded.Affected timeframes:US region: 05:14 to 06:41 UTC and 14:55 to 15:48 UTCEU region: 14:55 to 15:48 UTCBased on our analysis, approximately 25% of US inbound traffic and 50% of EU inbound traffic had a chance to have been impacted during these windows. We're unable to provide exact counts due to gaps in our logging for rejected inbound mail, which we have since corrected.
Deterministic readout · awaiting AI summary pass
Incident detected
Minor confidence crossed the incident threshold for Elevated inbound recipient rejected.
Marked resolved
The incident was closed after 45 min of observed impact.
No per-source signal payloads were preserved in this incident's snapshot window.
Confidence scoring
25.00The incident reached 25.00 peak confidence across available stored status snapshots.
User reports
0 / 15mNo elevated user-report volume was preserved in the incident window snapshots.
Status samples
0 affectedThe incident row exists, but the bounded snapshot window does not include affected status samples.
Recovery signal
ResolvedRecovery was recorded at Thu, Nov 13, 2025, 11:15 AM UTC.
Mailgun users likely saw failed connections, degraded availability, or session instability for this Email API service. The incident reached Minor severity and lasted 45 min. The stored report window does not show a preserved user-report spike.