Email Delivery Delays
- investigating
We are currently experiencing an issue that is causing delays in the delivery of emails sent from our platform. As a result, emails may take longer than expected to reach recipients.
- investigating
We are investigating delays affecting email notifications sent by Signhost. The Signhost platform remains fully operational and document processing is not impacted. The issue is currently limited to email delivery, which may result in notifications reaching recipients later than usual. We are working with our email service provider to resolve the issue as quickly as possible
- identified
We have identified that the delays affecting email notifications sent by Signhost are related to a broader Microsoft 365 Exchange Online incident. At this time, the Signhost platform remains fully operational, and document processing, signing, and transaction handling are not affected. The impact is limited to email notifications being delivered later than usual. Recipients may experience delays in receiving notifications. We are continuing to monitor the situation closely together with our email service provider. We will provide the next update on Monday morning.
- resolved
The issue affecting email notification delivery has been resolved. Email notifications are now being delivered as expected, with no further delays observed.
- postmortem
### What happened? On September 4th 2026, some Signhost email notifications, including signing invitations and status updates, were delivered later than usual. During this period, the Signhost platform remained fully operational. Document signing, transaction processing and API functionality were not affected. ### What caused the issue? Our investigation confirmed that the delays were caused by a broader Microsoft 365 Exchange Online incident affecting email processing and delivery. Microsoft reported delays and “server busy“ errors affecting Exchange Online infrastructure. The issue originated outside of Signhost and was not related to the Signhost application, infrastructure or services. It is important to note that Signhost does not use Microsoft Exchange Online to send email notifications. Our email delivery is handled through SparkPost, our email service provider. More information about the Microsoft incident can be found here: [Exchange Online outage causes email delays and server busy errors](https://www.bleepingcomputer.com/news/microsoft/exchange-online-outage-causes-email-delays-server-busy-errors/) ### What we did? We worked closely with our email service provider to monitor the situation and verify the root cause. Throughout the incident, we continuously monitored Signhost services and confirmed that core platform functionality remained unaffected. Once Microsoft resolved the Exchange Online incident, email delivery returned to normal. We have verified that email notifications are now being delivered as expected, with no further delays observed. We would like to reassure customers that no documents, transactions or customer data were impacted and no action is required on your part.