One I made up for a caster who always missed their rolls was a sentient wizards hat ‘clippy’. “I see you were trying to cast Eldrich Blast, do you need help with that” and occasionally giving them advantage (they really were rolling awfully)
I was bad at RPing it though and that campaign ended shortly after anyway
I mean, your connection to your email provider is encrypted (I hope!) - probably with TLS
Your email provider will communicate with the receivers email server over an encrypted connection (probably TLS again)
Your recipient connects to their provider over a secure connection too!
Yes, your email companies can read it, but that is the case with lots of IM providers too…