I remember watching a christmas movie as a child but I can't seem to remember much about the movie... it has something to do a mail box and christmas letters... I also remember there being littles elfs... but that's all that I can remember... does anyone know the name of it...

There really isn't enough info for me to know, however, I've found you a list of a bunch of Christmas movies. You could look through there and see if a title rings a bell.

Christmas Movies

Hope this helps.

The Elf Who Saved Christmas (1992) (TV) ?

Nice...