Having issues where people that are in the system do not get generated posts, such as, in memory posting when someone has passed or other notifications.

I have gone in to a specific person‘s email and they are in there, but they don’t get anything at all. Why is that?

Under Admin Functions > Statistics > Notify Me Statistics, you can see which classmates have which boxes checked to receive emails, either Immediately, Once Daily, or Never. The only reasons, it seems to me, that classmates are not receiving emails is their email is not valid, i.e. has not been updated. But this should generate a bounced email. Although I'm beginning to see bounced emails once again, after not seeing them for a long time, I'm not sure the bounced email problem is completely resolved. Your idea, in another post, of sending the email via your personal gmail account, as a check to see how many bounces you receive, is a good idea.

Email is still flawed regards "bounces". Messages between classmates do get bounces, but not sending class emails.

If a classmate hasn’t updated anything on their page for a long period of time, would that be a reason why they don’t get any notifications?

I did see that I got many bounce backs, which is extremely unusual so that could be another problem