Outage in Tessian EU
Gateway outage between approximately 07:30 UTC and 08:36 UTC
Resolved Major
May 13, 2026 - Started 3 days ago
- Lasted about 2 hours
Incident Report
Summary AI Generated
Tessian EU experienced a gateway outage from 07:30 to 08:36 UTC caused by a capacity limitation during a routine security patch application, affecting some customers' inbound and outbound email server availability. The issue has been fully resolved with servers now showing as available, and queued emails are being delivered automatically with minimal delays and no data loss.
Between approximately 07:30 UTC and 08:36 UTC, some customers experienced an outage where inbound and outbound server statuses were shown as 'Unavailable'.
The issue was caused by a capacity limitation encountered during the application of a routine security patch.
This has been fully resolved — server statuses should now show as 'Available'.
Any emails queued during the incident are expected to be delivered automatically without intervention.
No data loss occurred, and we anticipate minimal delivery delays.
We apologise for any disruption caused.
Trusted by 1,000+ teams
Never miss outages in third-party dependencies
Stop finding out about outages from your users. Monitor 6,320+ cloud services and get alerted the second something breaks.
Latest Updates ( sorted recent to last )
MONITORING
3 days ago - at 05/13/2026 12:09PM
Between approximately 07:30 UTC and 08:36 UTC, some customers experienced an outage where inbound and outbound server statuses were shown as 'Unavailable'.
The issue was caused by a capacity limitation encountered during the application of a routine security patch.
This has been fully resolved — server statuses should now show as 'Available'.
Any emails queued during the incident are expected to be delivered automatically without intervention.
No data loss occurred, and we anticipate minimal delivery delays.
We apologise for any disruption caused.
Latest Tessian EU outages
Delays in Outbound Security Events Being Available in the Portal - about 8 hours ago
Tessian Gateway Not Accepting Mail - 19 days ago
Gateway Connection Issues impacting mailflow for Gsuite Customers - about 1 month ago
Internal Emails Missing from Investigate & Respond - about 1 month ago
Never miss outages in third-party dependencies
With IsDown, you can monitor all your critical services' official status pages from one centralized dashboard and receive instant alerts the moment an outage is detected. Say goodbye to constantly checking multiple sites for updates and stay ahead of outages with IsDown.
Start free trialNo credit card required · Cancel anytime · 6320 services available
Integrations with
