Lockbin.com is a website owned by Encryptomatic LLC since about 2008. We've run the site as an experiment for several years, providing an infrastructure for those wanting to share messages online, securely. Lockbin has been used by people all over the world as a secure message locker. Lockbin does not hold your keys (your do) so that your messages are always secure.
A new version of the Lockbin software launched recently, providing even more security and ease of use. The service is still free, just as it has always been, although Lockbin has added a new tier of services for subscribers who need more.
For more information on Lockbin, or to try it free, just follow this link: email encryption service.