Why aren't replies to my posts in these forums ever to be found in Cox mail?

First, a confession that I don't use Cox email. At all. Ever. For me it's just like the phone service I pay for with still no telephonic device in my residence---but without this extra "benefit" feature my Cox bill would be substantially higher than it is.

That said, as a regular visitor to the forums here I find it odd, that even though I've set up my Cox email account to receive notifications of replies to posts made here on the forums, despite having checked the box below all forum posts designating "Email me replies to this post", they are nowhere to be found in my Cox mail. I will also admit that it isn't too great an effort to check in on these forums to discover that there are, in fact, replies to questions/issues/posts made here. It might also be that I am misinformed or naïve in the belief in my expectation that replies would automatically be forwarded to my Cox email account.

Cox App Suite

UI version: 7.8.2 Rev28
Server version: 7.8.2-Rev35

2016-2020 OX Software GmbH

A couple of other questions which may or may not have any relevance to this topic but of which I am, as a Cox paid subscriber, curious about:

while in:
myemail.cox.net/appsuite/Inbox/Common setting there is a box, checked, with "Ask for mailto link registration" What specifically does that setting do?

Also, while in the "Edit mail account" account setting, UNchecked is a box labeled "Use unified mail for this account". What does this setting do?