This documentation is for Dovecot v1.x, see wiki2 for v2.x documentation.


A high performance mbox-replacement created by Marc Crispin of University of Washington for UW-IMAP. Each message in the file is preceded by a record carrying all the metadata that IMAP-protocol needs. This allows changing the metadata easily by modifying the fixed-size header, rather than moving data around in a file like with mbox.

File locking is handled more intelligently (only appends may need to wait for locks), making this format a good choice for shared mailboxes.

Downsides contain:

None: MailboxFormat/mbx (last edited 2009-11-11 17:00:25 by TimoSirainen)