Mailjet had 4 outages in the last 2 years totaling 16h 32m of downtime — averaging 0.2 incidents per month.
There were 4 Mailjet outages since October 1, 2025 totaling 16h 32m of downtime. Each is summarised below — incident details, duration, and resolution information.
Starting around 08:00 UTC, Microsoft began experiencing an incident causing an increased volume of deferred emails across all M365 regions. The affected responses are returning "451 4.7.500 Server busy". Our teams are actively monitoring the situation. No other email providers are currently affected.
This incident has been resolved.
We are currently investigating this issue.
The issue has been identified and a fix is being implemented.
A fix has been implemented and we are monitoring the results.
This incident has been resolved.
Lag are identified we are investigating the issue
The issue has been identified and our team is working on a fix.
The fix is under review.
The fix is now under testing.
A fix has been implemented and we are monitoring the results.
We'll be monitoring the situation throughout the night until 9am CET to ensure stable service delivery.
We are continuing to monitor for any further issues.
This incident has been resolved.
We are currently investigating this issue.
We are continuing to investigate this issue.
The issue has been identified and a fix is being implemented.
A fix has been implemented and we are monitoring the results.
This incident has been resolved.