A few versions ago (sorry forgot which one, but it was back in March 2013), when an admin has approved / published an event submitted by a requester who is a Subscriber, the requester will get an e-mail confirmation via the template "Event approved" or "Event reapproved" defined under "Event Submission Templates"
However, with the current version (5.4.3) this feature does not seem to be working.
Other e-mail features still work (i.e. Event submitted, Event Re-submitted that are sent to the Administrator)
Verification of local server SMTP logs does not have entries of the "Event approved" or "Event reapproved" e-mails, but do show "Event submitted" or "Event Re-submitted" e-mails.
I'm not sure if the changes made between the Events Manager versions for the e-mail features had caused this behavior.
Any help is greatly appreciated. Thanks!