DBX, Outlook Express E-mail Folder (.dbx)
The DBX Misc file format
Outlook Express, the e-mailing program native to Microsoft operating systems, uses DBX files for their folders. The DBX file contains the e-mail messages saved in a specific folder or mailbox on Outlook Express. It serves the purpose of save e-mails and make a backup of received messages.
Technical details of DBX files
DBX files can typically be found in the user directory under "Documents and Settings". The files are accordingly named after the mailboxes they were created from. DBX files can be copied to other folders or imported to other Microsoft e-mailing programs like Windows Mail and Windows Live Mail. Thus, this file is very versatile and can be used by different e-mailing programs without any loss of information. To do so, go to "File > Import > Messages" and choose to import from Outlook Express 6 (or OE6). However, it's not advised to open and manipulate the files manually as they can become corrupted easily.