I have a quick blogger request for some of you. I had this same problem too, and didn't even realize it until Holly told me about it and I quickly researched how to change it.
There is a special setting that you have to go into Blogger to set, to allow people to respond to your comments by e-mail. So many times I get such a sweet comment on one of my blog posts and I go to reply to their comment, and come to find out they don't have their e-mail linked and I don't have a way to respond and say thank you. There is a tutorial here on how to change this setting in Blogger.
I hope you're all having a wonderful week!