That ~kinda~ worked

So.

I setup being notified, via email, for every comment I receive. I setup a little inbox for all the mails and everything. This way, I thought I could email someone back when they asked me something in a comment very easily.

BUT ...

Most comments, even from logged-in bloggers, don't have a return email in my notification. Just no-reply@blogger.com or something of the like. SOME people have their email in the notification, but just a handful.

Argh! I looked all through the settings and I can't find anything. Does anyone know if it's a setting of mine or the commentor which allows their email to be part of their comment?