Urgent help needed - ctl_cyrusdb[3698]: DBERROR db3: /var/imap/mailboxes.db: unexpected file type or format

[Oliver Simon]

Help please !!!

Looks like a big big problem ....

Something has corrupted my mailbox.db, and I think, I have to bite my
ars%$. There is no backup ... About 50 users, Between 20 k and 30 MB
mailboxes ... Please help, what can I do to recover this ?
Working with web-cyradm, Postfix 2.1.15 and cyrus 2.15 (?)

ctl_cyrusdb[3698]: DBERROR db3: /var/imap/mailboxes.db: unexpected file
type or format

No login possible at this time ...

Any help were great !!!