Earlier quoted context omitted.
Enigmail functionality is now built-in, it's quite nice!
When TB78 was introduced, the only supported S/MIME and did not allow inline encryption in plaintext. Has this changed now?
Re: The Future of Thunderbird
#471I use OpenGPG for signing and writing emails, they are plaintext encrypted.
https://support.mozilla.org/en-US/kb/openpgp-thunderbird-how...
https://www.linuxbabe.com/security/encrypt-emails-gpg-thunde...