Delayed sending in EU
Affected: APIOutbound Delivery
Mailgun Outage History
Mailgun is up right nowMailgun had 21 outages in the last 2 years totaling 69h 39m of downtime — averaging 0.9 incidents per month.
There were 21 Mailgun outages since July 21, 2025 totaling 69h 39m of downtime. Each is summarised below — incident details, duration, and resolution information.
Automatic Sender Security Records Not Provisioning
Affected: Control Panel
Timeline · 4 updates
- identified May 06, 2026, 03:40 PM UTC
Customers creating domains with Automatic Sender Security may have CNAME records with no corresponding TXT records reflecting DKIM keys. A fix for this issue is being prepared.
- identified May 06, 2026, 07:46 PM UTC
We are continuing to work on a fix for this issue.
- monitoring May 07, 2026, 12:40 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved May 07, 2026, 06:42 PM UTC
This incident has been resolved.
Elevated Timeouts for Validations
Affected: Email Validation
Timeline · 4 updates
- identified Apr 17, 2026, 04:45 PM UTC
The issue has been identified and a fix is being implemented.
- monitoring Apr 17, 2026, 05:05 PM UTC
A fix has been implemented and we are monitoring the results.
- monitoring Apr 17, 2026, 05:05 PM UTC
We are continuing to monitor for any further issues.
- resolved Apr 17, 2026, 05:15 PM UTC
This incident has been resolved.
TLS Certificate Validation Errors for Clients Without SNI
Affected: API
Timeline · 4 updates
- investigating Apr 15, 2026, 01:40 PM UTC
We are currently investigating an issue where customers making HTTPS requests to our API without Server Name Indication (SNI) enabled are being presented with an expired SSL/TLS certificate. This results in certificate validation failures for affected clients.
- identified Apr 15, 2026, 01:42 PM UTC
The issue has been identified and a fix is being implemented.
- monitoring Apr 15, 2026, 02:02 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Apr 15, 2026, 03:34 PM UTC
This incident has been resolved.
Elevated 500 errors on Messages endpoint in US
Affected: API
Timeline · 3 updates
- identified Apr 07, 2026, 05:30 PM UTC
The issue has been identified and a fix is being implemented.
- monitoring Apr 07, 2026, 05:32 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Apr 07, 2026, 05:42 PM UTC
This incident has been resolved. Elevated 500 errors beginning at 17:25 UTC resolved at 17:30 UTC
Elevated 401 errors in US Region
Affected: API
Timeline · 2 updates
- identified Mar 19, 2026, 06:43 PM UTC
Some requests may be incorrectly failing with 401 error codes in our US region.
- resolved Mar 19, 2026, 06:53 PM UTC
A fix has been deployed and systems are back to normal.
Intermittent API Errors in US Region
Affected: API
Timeline · 5 updates
- investigating Mar 13, 2026, 11:29 AM UTC
We are currently investigating this issue.
- investigating Mar 13, 2026, 11:56 AM UTC
We are continuing to investigate this issue.
- identified Mar 13, 2026, 12:19 PM UTC
The issue has been identified and a fix is being implemented.
- monitoring Mar 13, 2026, 12:33 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Mar 13, 2026, 12:49 PM UTC
The incident has been resolved.
Intermittent Email Validation Errors
Affected: APIEmail Validation
Timeline · 8 updates
- investigating Feb 25, 2026, 07:10 PM UTC
We are currently investigating this issue.
- investigating Feb 25, 2026, 07:29 PM UTC
We are continuing to investigate this issue.
- identified Feb 25, 2026, 07:29 PM UTC
Domain verification is also impacted. Increased chances of domain verification failing. The issue has been identified and engineering is actively working on a fix.
- identified Feb 25, 2026, 07:30 PM UTC
We are continuing to work on a fix for this issue.
- identified Feb 25, 2026, 07:47 PM UTC
We are continuing to work on a fix for this issue.
- identified Feb 25, 2026, 08:25 PM UTC
We are continuing to work on a fix for this issue.
- monitoring Feb 25, 2026, 09:36 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Feb 25, 2026, 09:45 PM UTC
This incident has been resolved.
Delayed Logs in EU Region
Affected: Events & Logs
Timeline · 3 updates
- identified Nov 29, 2025, 08:38 AM UTC
Logs are currently experiencing delays of 15 minutes in Mailgun's EU region. Outbound processing, inbound processing, and webhook delivery are operating normally.
- identified Nov 29, 2025, 09:02 AM UTC
Logs are currently experiencing delays of 20 minutes in Mailgun's EU region. Outbound processing, inbound processing, and webhook delivery are operating normally.
- resolved Nov 29, 2025, 09:56 AM UTC
This incident has been resolved.
Delayed Logs in US Region
Affected: Events & Logs
Timeline · 3 updates
- identified Nov 28, 2025, 04:30 PM UTC
Logs are currently experiencing delays of 15 minutes in Mailgun's US region. Outbound processing, inbound processing, and webhook delivery are operating normally.
- monitoring Nov 28, 2025, 05:19 PM UTC
Events are processing normally, we continue to monitor as we see elevated send volumes.
- resolved Nov 28, 2025, 05:56 PM UTC
Events are processing normally.
Elevated inbound recipient rejected
Timeline · 1 update
- resolved Nov 18, 2025, 01:31 PM UTC
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 UTC EU region: 14:55 to 15:48 UTC Based 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.
Delayed Message Processing in US
Affected: Outbound Delivery
Timeline · 4 updates
- monitoring Oct 24, 2025, 02:14 PM UTC
We have identified processing delays for some messages in our US region. A fix has been deployed and we are monitoring the recovery.
- monitoring Oct 24, 2025, 02:47 PM UTC
Queues are being worked through, we continue to monitor resolution.
- monitoring Oct 24, 2025, 03:40 PM UTC
Operations are back to normal and queues are cleared. We'll continue to monitor.
- resolved Oct 24, 2025, 03:58 PM UTC
This incident has been resolved.
US Email Ingest Errors
Timeline · 1 update
- resolved Oct 08, 2025, 03:00 PM UTC
Between 12:55 UTC and 13:07 UTC, customers may have experienced email sending failures in the US region. A deployment of new code caused our sending pipeline to temporarily reject some email submissions with HTTP 500 or SMTP 451 errors (~ 2.5% of requests). Our team quickly identified the issue, rolled back the deployment, and restored normal service. Traffic was immediately shifted from the affected US region to the non impacted region to further mitigate customer impact while the rollback took place.
Login issues with Mailgun Application
Affected: Control Panel
Timeline · 5 updates
- investigating Sep 30, 2025, 10:57 AM UTC
We are currently investigating this issue.
- identified Sep 30, 2025, 11:15 AM UTC
The issue has been identified and a fix is being implemented.
- monitoring Sep 30, 2025, 11:46 AM UTC
A fix has been implemented and we are monitoring the results.
- monitoring Sep 30, 2025, 11:46 AM UTC
We are continuing to monitor for any further issues.
- resolved Sep 30, 2025, 12:13 PM UTC
This incident has been resolved.
Sending errors in US
Affected: API
Timeline · 10 updates
Message Delays in US Region
Affected: Outbound Delivery
Timeline · 3 updates
- investigating Sep 12, 2025, 06:26 AM UTC
We are currently investigating this issue.
- monitoring Sep 12, 2025, 07:29 AM UTC
A fix has been implemented and we are monitoring the results.
- resolved Sep 12, 2025, 08:25 AM UTC
This incident has been resolved.
Email Validation 500s
Affected: Email Validation
Timeline · 6 updates
- investigating Sep 11, 2025, 10:56 PM UTC
We are currently investigating this issue.
- identified Sep 12, 2025, 12:15 AM UTC
The issue has been identified and a fix is being implemented.
- identified Sep 12, 2025, 01:00 AM UTC
The issue has been identified and we continue to work on a fix for this issue.
- monitoring Sep 12, 2025, 02:07 AM UTC
A fix has been implemented and we are monitoring the results.
- monitoring Sep 12, 2025, 02:07 AM UTC
We are continuing to monitor for any further issues.
- resolved Sep 12, 2025, 02:19 AM UTC
This incident has been resolved.
EU email delivery latency
Affected: Outbound DeliveryInbound email processingEvents & Logs
Timeline · 7 updates
- investigating Sep 01, 2025, 04:23 PM UTC
Email's sent from our Europe region may be experiencing increased delivery times. We are currently investigating.
- identified Sep 01, 2025, 04:25 PM UTC
The issue has been identified and a fix is being implemented.
- identified Sep 01, 2025, 04:31 PM UTC
We are continuing to work on a fix for this issue.
- identified Sep 01, 2025, 04:38 PM UTC
We are continuing to work on a fix for this issue.
- monitoring Sep 01, 2025, 04:38 PM UTC
A fix has been implemented and we are monitoring the results.
- monitoring Sep 01, 2025, 04:53 PM UTC
Queues are being worked through. Normal email delivery times will resume shortly. In addition to delayed email delivery, these other parts of our system saw increased processing time as well: inbound routes, forwards, webhook delivery, and unsubscribe processing.
- resolved Sep 01, 2025, 05:11 PM UTC
This incident has been resolved.
US email delivery latency
Affected: Outbound Delivery
Timeline · 3 updates
- monitoring Aug 20, 2025, 04:20 PM UTC
Email's from our us-east region may have experienced longer delivery time between 16:00 UTC and 16:20 UTC. The issue is resolved and we are monitoring.
- monitoring Aug 20, 2025, 04:27 PM UTC
Services are fully operational.
- resolved Aug 20, 2025, 05:14 PM UTC
This incident has been resolved.
Partial Delay in Event Processing
Affected: Events & Logs
Timeline · 4 updates
- identified Jul 29, 2025, 03:37 PM UTC
Customers using the events or logs APIs or viewing logs in the customer portal may see delays in some events appearing.
- monitoring Jul 29, 2025, 03:45 PM UTC
A fix has been implemented and we are monitoring the results.
- monitoring Jul 29, 2025, 05:54 PM UTC
We are continuing to monitor the system as delays resolve
- resolved Jul 29, 2025, 06:17 PM UTC
This incident has been resolved.
HTTPS Tracking Certificate Creation / Renewal blocked by Let's Encrypt Outage
Affected: API
Timeline · 3 updates
- identified Jul 21, 2025, 11:56 PM 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 Jul 22, 2025, 05:22 AM 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 Jul 22, 2025, 11:33 AM UTC
This incident has been resolved.