After upgrading to Performance Management r3.7.12, it was observed e-mails are no longer received. Prior to the upgrade emails were working.
The SsoConfig setting were somehow changed.
Run the SsoConfig script and verify the setting are correct. Also try sending an email from the CAPC server using telnet or something similar. This will help to determine if the issue is with CAPC or the environment.
To troubleshoot email issues, we can turn on debug, please perform the following steps: