Seeking Advice for data recovery

[Riccardo Bicelli]

Hello,
we had a drive failure and needed to restore our dovecot server to
operational status in no time.
So we restored an "old" snapshot backup and worked on the failed drive
in order to recover the mails.
Data backup didn't worked :-(
Now the storage is updated with mails from beginning of time to
snapshot, and from recovery day to now, and a copy of the storage of
mails from beginning of time to failure.
Is there a way to "inject" the mails from "snapshot to failure"? Which
is the best way? We're using mdbox.
Thanks,
Riccardo