

Not sure exactly sure how it all works. I’ve never needed to open ports for qbittorrent for downloading or seeding, I imagine it’s the same principal. I 100% don’t have any ports open and can see people actively downloading my music in slskd, confirmed even more by the thank you messages I receive for sharing.
It’s not really that privacy friendly, but I use zoho. You can send emails free from aliases with your own domain name so I have emails coming from nextcloud@mydomain pve@mydomain etc.