1) Daniel will most likely not be accepting new registration as he has stated.
2) Avoid DNMX as it is dangerous.
3) There is absolutely no such thing as 'the best email provider' -- the concept is invalid and technically unsound.
4) Encrypt the contents on your email and leave the subject line blank.
https://mail.tutanota.com
https://mailfence.com
https://www.guerrillamail.com
https://skiff.com
https://www.secure-email.org
https://maildrop.cc
https://www.mailinator.com
https://www.secure-email.org
https://librem.one
http://torbox36ijlcevujx7mjb4oiusvwgvmue...yqad.onion (TorBox)
http://6n5nbusxgyw46juqo3nt5v4zuivdbc7mz...gister.php (Morke)
http://mail2torjgmxgexntbrmhvgluavhj7ouu...kwyd.onion (Mail2Tor)
http://2nxpboa3ya52j5au4gxwkdt4nxoh5g4y4...doid.onion (SecretMail)
http://ovhcd6qhuz22bid42pw7unwfqf7i55rgh...t6id.onion (Hobe Onion Mail)
http://5nm4mdhzyfbif6i5qv3kh4i7j2trlbuvu...fcqd.onion (Hidden Mail Onion Server)
https://onionmail.org (Clearnet)
http://pflujznptk5lmuf6xwadfqy6nffykdvah...hfid.onion (Onion Mail)
http://en.vzoc4aylgsqwexe6okjbz2ix5atgdv...7rid.onion (OnionMail)
http://eot3almpracnkz7gz3r5yr3qaymngqsrm...xoqd.onion (Dozaru Onion Mail)
http://2nxpboa3ya52j5au4gxwkdt4nxoh5g4y4...doid.onion (Systemli)
https://www.systemli.org/en/ (Systemli Clearnet)
2) Avoid DNMX as it is dangerous.
3) There is absolutely no such thing as 'the best email provider' -- the concept is invalid and technically unsound.
4) Encrypt the contents on your email and leave the subject line blank.
https://mail.tutanota.com
https://mailfence.com
https://www.guerrillamail.com
https://skiff.com
https://www.secure-email.org
https://maildrop.cc
https://www.mailinator.com
https://www.secure-email.org
https://librem.one
http://torbox36ijlcevujx7mjb4oiusvwgvmue...yqad.onion (TorBox)
http://6n5nbusxgyw46juqo3nt5v4zuivdbc7mz...gister.php (Morke)
http://mail2torjgmxgexntbrmhvgluavhj7ouu...kwyd.onion (Mail2Tor)
http://2nxpboa3ya52j5au4gxwkdt4nxoh5g4y4...doid.onion (SecretMail)
http://ovhcd6qhuz22bid42pw7unwfqf7i55rgh...t6id.onion (Hobe Onion Mail)
http://5nm4mdhzyfbif6i5qv3kh4i7j2trlbuvu...fcqd.onion (Hidden Mail Onion Server)
https://onionmail.org (Clearnet)
http://pflujznptk5lmuf6xwadfqy6nffykdvah...hfid.onion (Onion Mail)
http://en.vzoc4aylgsqwexe6okjbz2ix5atgdv...7rid.onion (OnionMail)
http://eot3almpracnkz7gz3r5yr3qaymngqsrm...xoqd.onion (Dozaru Onion Mail)
http://2nxpboa3ya52j5au4gxwkdt4nxoh5g4y4...doid.onion (Systemli)
https://www.systemli.org/en/ (Systemli Clearnet)