Expunging

   When accessing mail locally, the Pine Expunge command moves all
   messages marked for deletion to the VMS MAIL WASTEBASKET folder.
   In addition, it performs the equivalent VMS MAIL PURGE command
   only when your VMS MAIL profile allows for AUTO_PURGE. If you
   have set NOAUTO_PURGE, then the deleted messages are left in the
   WASTEBASKET folder. However, should you expunge the WASTEBASKET
   folder, then the VMS MAIL PURGE function will be performed.
   Purged message space is not available for reuse until a reclaim
   operation is performed. When the amount of deleted message space
   in the mail file exceeds 32,767 bytes, a reclaim operation is
   automatically done by the Expunge command.

                                  NOTE

      Pine never compresses your mail file.