For security disable password authentication - use public key instead, disable root login via ssh - use sudo or su from another user.

To reduce the number of attempts of others trying to get in change the ssh port and/or set-up fail2ban.

You could also set a firewall rule to only allow ssh from your IP address, if you have a static address at home and only need access from there, or have a way to VPN into your home network. Make sure you have a static address if you do this though, you don’t want your IP to change and be left locked out of your server.

The “correcthorse” part

You could use rclone with any service it supports as encrypted cloud storage by using its crypt feature. More technical to set up though than just installing an app.

The basic steps are:

1. Register a domain of your choice
2. Select who you are setting up your email with (plenty of different providers, Zoho has a basic free plan that would be suitable for a single domain and only a few users at most; Google, outlook etc. also sell services for custom domains)
3. Configure the DNS records for your domain to whatever your chosen email provider says (MX records to point to the mail server and some records for DMARC & DKIM to prevent your email being spoofed)
4. Test it all works and start using it

I’m not going to write a full tutorial so if it sounds interesting I suggest you do more research. The email hosting is typically focused at businesses as they are most likely to be wanting to host email on a custom domain.

It’s available in the Izzy on droid repo, you’ll have to add the repo to the f-droid app with the following URL:

https://apt.izzysoft.de/fdroid/repo?fingerprint=3BF0D6ABFEAE2F401707B6D966BE743BF0EEE49C2561B9BA39073711F628937A

Or scan the QR code here: https://apt.izzysoft.de/fdroid/