This version can now convert both 32 bit Outlook files (pre 2003), and the 64
bit Outlook 2003 pst files. Utilities are supplied to convert email messages to
both mbox and MH mailbox formats, and to DII load file format for use with many
of the CT Summation products. Contacts can be converted to a simple list, to
vcard format, or to ldif format for import to an LDAP server.

It includes:
- readpst: convert PST (MS Outlook Personal Folders) files to mbox and other
  formats
- lspst: list PST (MS Outlook Personal Folders) file data
- pst2ldif: extract contacts from a MS Outlook .pst file in .ldif format
- pst2dii: extract email messages from a MS Outlook .pst file in DII load format

WWW: https://www.five-ten-sg.com/libpst/