Fastmail is a mobile mailing and receiving service. Fastmail was founded in 1999 by Rob Mueller, Bruce Davey and Jeremy Howard.
mail.com is one of several email providers that doesn't require a user phone number to set up mailbox.
Tutanota is a free German web service dating back to 2011 and offers free and open source encrypted email exclusively funded through premium subscriptions
Protonmail provides an encrypted email account and other privacy settings to keep email safe.