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.MBOX File Extension – A Plain Text File!

MBOX extension is a plain text file which holds the email messages as 7-bit ASCII text and the attachments are stored in encoded format. Generally MBOX file is used for storing or organizing messages in a single text file which also stands for MailBox. The starting of each message is specified by "From" tracked by a white space character and end of each message is specified with a blank line.

  • mboxo: It is main Mbox format which uses the constant string "???@???" in place of sender's e-mail address.
  • mboxrd: It is variation of mboxo mailbox format.
  • mboxcl: It is the mailbox format used by Unix 'System V' mailboxes.
  • mboxcl2: "mboxcl2" mailbox format is similar to mboxcl.

The MBOX file comes under the category of Database Files.

The MBOX file is supported by 20+ desktop mail clients some of them are elaborated below:

  • Pocomail
  • Sylpheed
  • Netscape
  • ClawsMail
  • Cone
  • Mutt
  • OperaMail
  • Gnu Mail

Hex Signature: 00 0D BB A0

The default location of MBOX file is "/User/Library/Mail/Mailboxes/directory". The default location of MBOX file also depends on the email client. So this location may change for other mail clients.

  • Apple Mail: /User/Library/Mail/[account]/INBOX.mbox/Messages/
  • Mozilla Thunderbird: C:\Users\\AppData\Roaming\Thunderbird\Profiles\
  • Entourage 2008: C/Users/user_name/Documents/Microsoft User Data/Office 2008 Identities/Main Identity
  • Thebat: C:\Users\\App Data\Roaming\The Bat\Mail\profile folder
  • PocoMail: C:\Documents and Settings\Administrator\Application Data\PocoMail\Mail.
  • Mulberry: C:\Documents and Settings\Administrator\Application Data\Cyrusoft\Mulberry\Mailboxes
  • Evolution Mail: C:\Documents and Settings\Administrator\.evolution\mail'
  • SeaMonkey: C:\Documents and settings\Administrator\ApplicationData\Mozilla\SeaMonkey\Profiles\nz8lvw59.default\Mail.
  • Netscape: C:\Documents and settings\Administrator\ApplicationData\Mozilla\Profiles\default\2yv6fh2e.slt\Mail.
  • Opera Mail: C:\Documents and Settings\Administrator\Local Settings\Application Data\Opera\Opera\mail\store\account1
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