I'm not trying to have anonymous email, my personal email has my full name as the domain. I just want something that is encrypted and open-source. I give away

I'm not trying to have anonymous email, my personal email has my full name as the domain. I just want something that is encrypted and open-source. I give away my name and credit card info to plenty of websites. That won't help someone crack my private key used for lavabit any easier.