CipherSend - Password Free Secure Email
A CipherSend Button allows your website visitors to email you securely without a password.

KeptPrivate.com
A secure web-based email service which offers encrypted message storage. KeptPrivate also offers secure POP/IMAP access.

MarineNet Radio
Providers of wireless internet e-mail messaging globally via marine SSB radio.

Pop3Now
Software that allows users to manage 5 email POP3 accounts over a secure connection. It does not provide new email addresses.

Securenym
A secure, anonymous commercial email service.

Self-Destructing email with recipient tracking
Send email which automatically deletes itself after reading and prevents printing, copying, saving, and forwarding simply by adding ".selfdestructing.com" to end of recipient email address. Unrestricted free trial; subscription thereafter.

Shushmail.com
SSL encrypted email solutions for a single personal email account or an enterprise solution for your business. Web-based, POP and IMAP capabilities all served using 128 bit SSL.

Swissmail.org
Offers online secure email for personal and business use.