batch-unrmailbatch-unrmail is an autoloaded compiled Lisp function in `
unrmail.el'. (batch-unrmail) Convert old-style Rmail Babyl files to mbox format. Specify the input Rmail Babyl file names as command line arguments. For each Rmail file, the corresponding output file name is made by adding `.mail' at the end. For example, invoke `emacs -batch -f batch-unrmail RMAIL'.