WiseStamp incident
Microsoft 365 Server-Side Email Sending Limited Interruption
WiseStamp experienced a major incident on April 17, 2025 affecting Microsoft Exchange Online Integration, lasting 3h 9m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Apr 17, 2025, 03:10 PM UTC
We're aware that a limited number of customers using our Microsoft Exchange server-side deployment are experiencing a small portion of their outgoing emails not being sent as expected. The vast majority of emails continue to be delivered successfully. The issue has been identified, and we're actively working with Microsoft to roll out a permanent fix. Temporary workaround: If you’re affected, we recommend disabling your server-side rule. 1. Steps to Disable the Server-Side Rule in Exchange: 2. Go to https://admin.exchange.microsoft.com/#/homepage 3. Click on Mail flow → then Rules 4. Locate the rule named "Identify messages to send to WS SMTP" 5. Click the toggle under "Enable or disable rule" to disable it → This will automatically save the change We understand how important it is to keep your email signatures running smoothly, and we’re doing everything we can to resolve this quickly. We’ll keep you updated as progress is made. If you have any questions — whether related to this issue or anything else — please don’t hesitate to contact our support team.
- resolved Apr 17, 2025, 06:19 PM UTC
We’re happy to share that the recent issue affecting a limited number of Microsoft 365 customers using our server-side deployment has been fully resolved. The problem, which caused a small portion of emails to be blocked, was identified and addressed in collaboration with Microsoft. Email functionality has now returned to normal. No further action is required on your end. If you had previously disabled your server-side rule as a workaround, you may now re-enable it if desired by doing this: 1. Go to https://admin.exchange.microsoft.com/#/homepage 2. Click on Mail flow → then Rules 3. Locate the rule named "Identify messages to send to WS SMTP" 4. Click the toggle under "Enable or disable rule" to enable it → This will automatically save the change As always, if you have any questions or need assistance, our support team is here to help.