<Type Number> in mailboxes.db

Dan White dwhite at olp.net
Tue Aug 2 10:56:19 EDT 2011

On 02/08/11 16:30 +0200, Frank Elsner wrote:
>which values are possible and what is the corresponding meaning
>for the <Type Number> in mailboxes.db?
>After failed XFERs we see
>- on the murder
>  user.richard^hildebrand 1 mailcluster1
>- on mailcluster1
>  user.richard^hildebrand 8 mailbackend-1-febe!default
>We would like to know what this means.
>Is it in error? And if it is, how to solve the problem.

For documentation on the mailbox format, see:



/imap/mboxlist.h in the source:

/* flags for types of mailboxes */
#define MBTYPE_REMOTE (1<<0) /* Not on this server (part is remote host) */
#define MBTYPE_RESERVE (1<<1) /* Reserved [mupdate/imapd] /
                    Rename Target [imapd] (part is normal, but
                    you are not allowed to create this mailbox,
                    even though it doesn't actually exist */
#define MBTYPE_NETNEWS (1<<2) /* Netnews Mailbox - NO LONGER USED */
#define MBTYPE_MOVING (1<<3) /* Mailbox in mid-transfer (part is
remotehost!localpart) */
#define MBTYPE_DELETED (1<<4) /* Mailbox has been deleted, but not yet
cleaned up */

It appears that mailcluster1 believes a mailbox transfer was initiated, but
has not yet completed (or failed).

You can use cyr_dbtool to manually edit the entry in your mailboxes.db, or
remove it. See:


Dan White

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