I figured out how to directly email each of my commentors on any given post! Actually, it wasn't ME who figured it out........A dear friend helped me.
Here's the scoop: If you have Followers, their pictures will appear on your sidebar. You can click on each picture, and a window should pop up. On the left, you should see "Send a Message". Click on this, and an email window will pop up. Compose your reply and just hit send!!
Laura, thanks for your help.