Hi Felix, thanks for getting back to my question. I appreciate the time you’ve put in already with Borgmatic and thanks to it’s de-duped backups I can keep many more snapshots and still use less disc space than before.
I had a look into adding the extra bits as new sources and I can’t remember which it was but one would always end up getting stuck during a backup run while the other two would add fine.
While I’d say I know enough about running a mail server, I didn’t feel confident with the changes I made so I stuck with Borgmatic using your guide and I still use the “official” script to backup postfix, rspamd and redis.