Well, that has been happening to me and I have bee wondering why. I mean there was no was a no reply blogger. I knew I had set it to show email. That was until I changed my blogger profile to google+ profile and I don't think I would have known if I hadn't been trying to see if people get emailed when you reply on their comments. I don't know if this has happened to everyone who switched or just a few, but if I were you I would check by commenting on your own blog and see if the email you get has your email address or if it is suddenly no reply.
I have searched everywhere to find out enable the google+ profile to all you to change it from no reply, but there doesn't seem to be away, the closest answer I have found is on the blogger help page: where is says it might be for security reasons, not to expect that any time soon and the comment will forward onto blogger support. So I put my two cents and and I suggest you do to if you want that to get changed.
However, in the mean time I am switching back to my blogger profile. Which means I lose some of the functions of the google+ profile, but will be able to receive responses to my comments again.
So if you want to do the same, here is how to fix that little issue.
First go to your blogger dashboard and click the little gear and select revert to Blogger profile.
Ignore the whole thing about how google+ will you allow you to connect better with your readers and click the orange button. I don't see how connecting better with my readers works, if no one can even reply to me when I comment on their blogs, or if they comment on mine and they are now noreply-comment. I think it may explain why my stats have dropped incredibly since I switched over to google+ profile. I mean who would want to visit someone they can't even reply to.
If it has been more that 30 days since you made the switch you will have to put in you name again.
Now click blogger profile.
Click edit profile.
Now, type everything back in, including your email address. Here is the most important part to make sure you receive comments: Make sure Show My Email is clicked or you will still be a no reply comment when you make comments on blogs.
To check to make sure you are no long a no reply blogger. Take a look at your blogger profile and make sure that it has the contact me section with a link to your email.
Hope that helps anyone one who like me became an no reply blogger and didn't even know it.