Lelantos Mail is a new Tor hidden service that you can use to send mail anonymously to addresses both inside and outside of Tor. Mail sent from one @lelantos.org address to another stays within Tor and never leaves the Lelantos Mail servers, and the servers are located outside of the USA.
A lifetime subscription to Lelantos Mail is $32 paid in bitcoin. You can find Lelantos Mail on Tor at lelantoss7bcnwbv.onion. If you have been searching for a replacement for Tormail take a look at Lelantos Mail.
Here is a screenshot of the email interface with javascript enabled:

You also have the option of using the familiar Squirrel Mail interface if you do not want to enable javascript. As was the case with Tormail you should use PGP (or Privnote at the minimum) for sensitive mail.
Why use PGP? As opposed to using a trustless messaging system like Bitmessage, there is always an element of trust involved when you use traditional email, even on Tor.
If you want to access Lelantos Mail from your desktop using the Thunderbird email client see our easy guide to setting up Thunderbird for Lelantos Mail using FoxyProxy which will let you access email on Tor and clearnet at the same time.