[Dovecot] mdbox corruption

[Daniel L. Miller]

I have isolated the corruption in a mailbox to 4 mdbox files.  Two of 
these (smaller) files cause the force-resync to report a breakage and 
save the file as m.XX.broken.  The other two (larger) files cause a crash.

Is there a way I can fix these files and recover the mails?
--
Daniel