“For this reason we have created Onion Mail, your email encrypted with PGP and your data does not reside on a single server but is distributed over the network. You can use Tor for browse the Hidden website and you can encrypt all your emails with your PGP key.'”
If this type of service appeals to you I recommend you check out https://www.privacyguides.org/en/email/
https://kycnot.me/search?q=sms&type=
For a few pennies you can anonymously pass any sms hurdle.
Not ideal, I realize.