Aid4Mail is a user-friendly Windows tool that helps you migrate your email messages to a different mail client, export them for viewing through Internet Explorer, MS Excel, or a database, convert them to extract or re-insert attachments, and archive them to save space or for compliance with legal requirements. It supports most popular mail client programs and processes messages quickly and faithfully, including those with file attachments and embedded contents like pictures and background images. Unlike other migration methods, Aid4Mail can also export message status information such as "unread", "read", "replied", and "forwarded" from most mail clients.

Key Features
User-friendly wizard interface.
Many useful and unique export options.
Supports most popular mail formats.
Can process mail folders and files from any drive, even off a CD-ROM.
Fast mail conversion, usually more accurate than alternative solutions.
Can process huge mailbox files - tested on 18 GB mbox files.
Correctly exports email with attachments, embedded contents, and status information.
Easily extracts file attachments, embedded contents, and email addresses.
Can rebuild Eudora, PocoMail, Calypso, and Courier archive messages back to standard MIME format.
Can strip attachments from messages and even save emails in plain text format.
The following features are available in the Aid4Mail Professional and Aid4Mail Enterprise versions:
Can export mail from Office Outlook and PST files (MS Outlook must be installed).
Can import mail into Office Outlook and PST files (MS Outlook must be installed).
Can read and write Outlook MSG files (MS Outlook must be installed).
Can filter messages by date range and/or by matching text in the mail header.
Can export mail to MHT format for viewing in Internet Explorer.
Can export mail details to tab-delimited file for import into a database.
Can create highly compressed mail archives in standard ZIP files.
Supported Mail Formats
Extended MAPI systems
Office Outlook (from version 97 to 2007)
Windows Messaging / Exchange Client, etc.,
Outlook Personal Storage files (*.pst),
Outlook MSG files (*.msg),
Outlook Express (versions 4, 5, and 6),
Windows Mail (Windows Vista mail client),
Windows Live Mail,
EML message files (*.eml),
Mac Mail.app message files (*.emlx),
MHT Web Archive files (*.mht),
Mozilla mailbox files (including Netscape and Thunderbird),
Generic mailbox files (mbox, Berkeley mail format, BSD mail format, Unix mail format),
Pine mbox files (with limited "From " escaping),
Eudora mailbox files (*.toc and *.mbx),
Macintosh Eudora mailbox files,
PocoMail/Barca mailbox files (*.idx, *.idb, and *.mbx),
Opera mailbox files (*.mbs)
Forte Agent mailbox files (*.idx),
The Bat! mailbox files (*.msb and *.tbb),
Pegasus mailbox files (*.pmi, *.pmm, and *.cnm),
Calypso and Courier archive files,
PMMail message files (*.msg),
FoxMail mailbox files (*.box),
maildir folders (local copies),
Mailbag Assistant mailbox files (*.mbg),
E-mail Examiner mailbox files (*.pmx),
and Aid4Mail ZIP archives (*.zip).
Aid4Mail can convert/export mail to:
Outlook Personal Storage files (*.pst),
Outlook MSG files (*.msg) - only if source is Extended MAPI mail,
EML message files (*.eml),
MHT Web Archive files (*.mht) - linked from an HTML index page or an MS Excel Workbook file,
MHT files with tab-delimited data file for import into a database,
Mozilla mailbox files (including Netscape and Thunderbird),
Generic mailbox files (mbox, Berkeley mail format, BSD mail format, Unix mail format,
PocoMail/Barca mailbox files (*.mbx),
and Aid4Mail ZIP archives (*.zip).
Note that Aid4Mail currently does not offer tools to convert address books from one format to another.

more info @http://www.aid4mail.com