PST Viewer Pro key features

Viewing headers, bodies and attachments of messages in MSG, EML and PST
Support for reading PST and OST files without MAPI (Messaging Applications Programming Interface)
Ability to view contacts, tasks, appointments,
Viewing messages with Plain Text, RTF and HTML
Lots of possible actions for messages, such as Reply, Forward, Print,
Exporting messages to multiple formats with lots of possible export
Advanced search, filtering and file system navigation
Highly customizable user interface with profiles
Command line
Integration with Windows and default email