Email in folders has a .emt format

Yesterday all my folders except inbox were empty. I found them in the Windows Live Mail folder on hard drive and I copied those files back to my e-mail program. but they are in .eml format and the computer can not open them, but it will open them in the hard drive folder. How do I get them to open when I check my email. Hope you can understand this as it is hard to describe.. Thanks

correction .eml format

I'm a little confused here, have you fixed the problem you are/were having, as it is marked as solved?