Detect Unprocessed Outbound Emails

We’ve had a few end users report that while they receive most approval email notifications, there have been instances where certain notifications were not received. I can confirm in BPM that the notifications were sent, but I’m unable to determine whether they were successfully delivered to the users’ Outlook inboxes. In order to make sure they are all being delivered, I found this scheduled job "Detect Unprocessed Emails" in which is will retry or resend the emails. My questions are this

1.) Will this resend an email notification that didn't originally go out, but was acted upon within the application? Ex. The user didn't get an email but approved it within Oracle.