Export Your Old Mailboxes on a Mac

If you want to archive an old mailbox (such as AOL mail) and own a Mac computer, you can use Apple's Mail app to easily get your email off the ancient service. Select the particular address(es) you're targeting, then choose Mailbox, then Export Mailbox into the folder of your choosing. It will show up as a .mbox file and can be reopened in the Mail app when you need to search for something.