mailbox in Mail to seperate .rtf files
I have one mailbox in Mail with about 50 messages which I want to save as 50 seperate .rtf (or text) files. If I choose that mailbox and then choose "Save As...", Mail saves all those 50 mesages as one file. Other than choosing each message seperately and then doing a "Save As...", is there any other way to save them as separate files?