!rant

Someone posted a link to a 30-day-security-challenge here on devRant some time ago and I just thought well, why not try to migrate away from the big companies - I've been using OneDrive as my only cloudstorage since the time when it was called SkyDrive and I've been hosting my Emails at outlook (via Live Custom Domains, a service that does not even exist anymore) for about 8 years now. Since I've always been lazy and since exchange activesync is a great feature if you have multiple calendars and want to sync them and your contacts to several devices I never tried to switch but now I am half done with migrating my data to my own nextcloud installation and my emails to my own mail server - since I don't want to loose the exchange functionality I am also setting up Z-Push and oh boy, this thing is bitching around but my webmail is already nicely integrated into nextcloud, IMAP / SMTP is up, configured and secured (still have to mess around with spamassassin as this email adress is floating around the web for about 10 years now). The only things to do is to get Z-Push work with STARTTLS and the card/caldav backend running and then the basic setup should be done.

I am just wondering if someone could hand me over a guide on how to sign / encrypt emails (GPG?)