On 01/05/2024 04:39 EEST David Mehler via dovecot dovecot@dovecot.org wrote:     Hello,   I've got a task to migrate a Dovecot mailstore, mailboxes, public folders, etc from an older server (it runs Dovecot 2.2.x) to a new server (running Dovecot 2.3.x). At the same time I'm needing to change mailbox storage formats, going from Mbox (on old server) to Maildir (on new server). I'm not sure if any of the mailboxes are compressed with zlib or encrypted, there's a lot of them, is there a way to find out compression or encryption and decompress/decrypt them prior to migration?   Suggestions welcome. Thanks. Dave.   -- Sent from Mozilla Thunderbird 91.13.1 _______________________________________________ dovecot mailing list -- dovecot@dovecot.org To unsubscribe send an email to dovecot-leave@dovecot.org   We have a migration guide at https://doc.dovecot.org/admin_manual/ migrating_mailboxes/   This should help you out. If mailboxes are compressed/encrypted and they work today, no need to do anything about them.   Important thing is to try out with test account(s) first.   Aki