I'm confused about using an alias.  I have two accounts, X and Y.  If I create an alias Z, I guess I can set it up so that I get emails from X and Y in the Z account.  But in X and Y I have folders that my emails are sorted in, like School, Work, Other.  Will those separate folders remain for X and Y within Z?  Like with I have X-School, Y - School, X - Work, Y - Work etc folders still?