Tutanota is a secure encrypted cloud email service that offers free for life services as well as paid services for a small cost. If all you require is a secure
Secure Email Providers
Encrypted emails and encrypted email storage providers. Secure mailboxes with upto 1GB of free storage space available for free. End-to-end encrypted mails, attachments, local encryption for stored mails. Secure alternatives to Gmail, Yahoo Mail, Hotmail.