Email alerts not working after coordinator upgrade (4370109)

Coordinator server was upgraded to latest version, then after the upgrade all the enabled alerts are not sending email. Errors similar to the following may be logged in the Coordinator log:

[ERROR][ChangeAuditor.Coordinator.ReportProcessorTask.SendEmail(0)] Could not send Microsoft Mail message, Unrecognized mail service.

And the following logged with debug logging enabled:

[DEBUG][ChangeAuditor.Coordinator.AlertProcessorEmailTask.OnStart(0)] No mail service specified for Email alerts
 

1. Open the Change Auditor Client
2. Click View | Administration
3. Select the Configuration tab on the bottom left and then Coordinator on the top left
4. Select Disabled under Email Alerts Configuration and then click Apply Changes
5. Restart the Coordinator service
6. Open the Change Auditor Client and select View | Administration again
7. Select the Configuration tab on the bottom left and then Coordinator on the top left
8. Select SMTP under Email Alerts Configuration
9. Retype the SMTP credentials
10. Click Apply Changes