Alpine, a newer and better-maintained email client very similar to Pine, has replaced the previously installed version of Pine. Although it is difficult to access existing local email folders with Mutt while using an IMAP configuration any existing Pine mail should be accessible in a new folder collection in Alpine.
From the Main Menu, press L to access the Folder Collections list and select the collection Old Pine Mail. If Old Pine Mail is not displayed in the collections list, return to the UNIX prompt and reset the Alpine configuration before trying again:
mv ~/.pinerc ~/.pinerc.old