If you're using Mailinabox for your mail server, it comes with a copy of NextCloud by navigating to "/cloud" -- you can sign in with your mailinabox credentials

If you're using Mailinabox for your mail server, it comes with a copy of NextCloud by navigating to "/cloud" -- you can sign in with your mailinabox credentials! I'm using it for everything from my keepass database to gnucash syncing, calendar and contacts too!