I'd like to find a way to backup mails preferably via pop or imap - great if dedup and incremental backup are available. Backing up ~/Library/Mail/V5 doesn't re

I'd like to find a way to backup mails preferably via pop or imap - great if dedup and incremental backup are available. Backing up ~/Library/Mail/V5 doesn't really work as expected. Regular snapshot/dumps are also not very effective.