Having an empty m-File, doveadm force-resync isn't able to detect and repair this:

-rw------- 1 vmail vmail 4948043 8. Jan 20:32 m.634 -rw------- 1 vmail vmail 5237411 8. Jan 20:32 m.635 -rw------- 1 vmail vmail 0 9. Jan 16:23 m.636

mail1:~ # doveadm force-resync -u user mailbox INBOX doveadm(user): Warning: fscking index file /vmail/example.com/user//mdbox/storage/dovecot.map.index doveadm(user): Warning: mdbox /vmail/example.com/user//mdbox/storage: rebuilding indexes doveadm(user): Error: Corrupted dbox file /vmail/example.com/user//mdbox/storage/m.636 (around offset=0): EOF while reading file header doveadm(user): Error: mdbox rebuild: Failed to fix file /vmail/example.com/user//mdbox/storage/m.636 doveadm(user): Error: mdbox /vmail/example.com/user//mdbox/storage: Duplicate GUID 2cafdd2f0224ec50773c0000085c1439 in m.627:16 and m.638:16

Peer

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