One user retired, and an e-mail address was deleted by Mail server.
After e-mail server maintenance, ProxySG won't send e-mail notification to all registered e-mail address.

ProxySG won't send notification e-mail to all registered e-mail address, if one of an e-mail address is wrong.
This behavior is our current specifications.
When you maintained E-mail Server, please perform the maintenance of ProxySG at the same time.