Sorry for the off-topic post, but I figured other mail gurus might know of a utility.
I've switched from a mail client that stores messages one per file to one that uses standard mbox format. I'm looking for a utility that will convert a directory full of individual message files into a single mbox file. (The old client uses a hierarchy of directories to represent folders, with each directory holding some metadata in separate files. The new client also has metadata files, an mbox file, and a subfolder directory containing subdirectories of other similar directories. I can cobble something up to translate the metadata files.)
