Hello,
Here are some Tor friendly e-mail providers. None of these want SMS
validation. Some have onion links but please check yourself for the
correct URL.
Do you know of any we can add to this list? Any onion only sites? Any
comments on these services?
Bitmessage.ch - https://bitmessage.ch/
Cock.li - https://cock.li/ (various domains available).
Mailbox.org - https://mailbox.org/
ProtonMail - https://protonmail.com/ (need invite).
RiseUp - https://help.riseup.net/ (need invite).
RuggedInbox - https://www.ruggedinbox.com/ (uses Squirrelmail; sometimes
down).
Sigaint - http://sigaint.org/ (use search for onion link).
Tutanota - https://tutanota.com
Unseen.is - https://www.unseen.is/ (requires secondary e-mail address;
can be slow to load).
VFEMail - https://vfemail.net/ (uses Horde).