How do I restore lost emails with Time Machine?

I would like to know how I restore lost drafts that I had on my mail program 6.6 with Time Machine.

I forgot that when you restore the mail program (was buggy) it saves all your emails except for your drafts. So now I need to find all the drafts that were deleted with my Time Machine.

Where are the drafts store prior to when I have to delete my mail program because of bugs in it?

How do I find them once I launch Time Machine. Can't recall where they are stored in my systems folder?

Thanks for any help regarding this.