Microsoft is currently experiencing issues with Exchange Online Protection (EOP), resulting in degraded performance across EOP servers.
This is causing delays in processing emails in and out of Microsoft 365 tenants. As Signature 365 relies on Exchange Online to send messages, some emails may also be delayed.
Microsoft have confirmed an issue their end, with the ID of EX1079935.
We are seeing email deliverability returning to normal. Our services continue to retry all emails, with no loss of signature functionality.
All emails are being delivered, although some will experience delays
This issue has been resolved
A delay with SMTP server-side injection was raised by our internal alerting system at 18:25 on the 14/5/25
The issue was identified and resolved by our internal dev team by 18:40, with the cause being traced to an SMTP service scalability issue.
All delayed emails were delivered by 19:00, and an update is currently in development to resolve the root cause of this delay.
No system outage was experienced as a result of this and all mail has been successfully delivered.
We are currently experiencing an issue with server-side signature injection. Our team is working to identify the root cause and fix the issue. Users may be experiencing delays for emails sending or receiving NDR delivery reports.
Client-side email injection is not affected. Further updates will be posted as the issue is investigated.
This issue has been resolved. Due to a change in Cloudflare API our certificate renewal process failed resulting in an expired certificate in the Canada region. We apologise for any inconvienience this may have caused.
We are currently experiencing an issue with server-side signature injection. Our team is working to identify the root cause and fix the issue. Users may be experiencing delays for emails sending or receiving NDR delivery reports.
Client-side email injection is not affected. Further updates will be posted as the issue is investigated.
This issue has been resolved. Due to a change in Cloudflare API our certificate renewal process failed resulting in an expired certificate in the Canada region. We apologise for any inconvienience this may have caused.
