I'm unclear on admin verification system

I'm setting up a forum for a group of us who play an online wargame. We expect our "enemies" to eventually find the forum and try to spy on us , so I'm not allowing users to confirm their own signups. Instead, I'm using admin verification.

When someone registers, I receive two emails. The first email, with the subject "New user registration," has a link that takes me to the user's profile. However, in that profile, I cannot see the email the user used to register, so I can't tell if I should allow that user or not.

The second email, with the subject "New user account," has a link that simply activates the user account without showing me anything.

The only way I can tell if I want to accept a registration is based on the email the user used to register, so how can I do that?

Admin Panel > Users & Groups > Inactive Users > Click on the username of the unregistered member > Check Details > Scroll down to "User is Active" > Yes | No > Save