Email deliverability issue to microsoft domains

Incident Report for SOTpay

Resolved

The issue appears to be resolved.
Posted Dec 05, 2025 - 16:34 GMT

Monitoring

A fix has been implemented and we are monitoring the results.
Posted Dec 05, 2025 - 14:03 GMT

Identified

We have made progress on identifying the issue and have been able to implement a workaround. We are now seeing delivery rates return to normal.
Posted Dec 05, 2025 - 12:09 GMT

Update

We are continuing to investigate this issue, and have been in contact with Microsoft to identify the issue.
Delivery rates have appeared to improve since 11:30, with a lesser percentage of these delivery errors.
Posted Dec 05, 2025 - 11:39 GMT

Investigating

We are currently seeing a siginifcant proportion of emails that we are sending to microsoft domains (e.g. hotmail.com, hotmail.co.uk, outlook.com, etc) not being delivered. No other receiving domains appear to be affected. We are investigating this issue and will update asap.
If you encounter this issue when sending payment links, please retry with a different email address, or use SMS.
Posted Dec 05, 2025 - 10:29 GMT
This incident affected: SOTPay Live Environment and SOTpay Sandbox Environment.