MailCloak is Global Web Security Systems breakthrough encryption program.
MailCloak was designed from the ground up to be the first encryption program for all mail clients, while making GnuPG public-key encryption so simple anyone can use it! MailCloak works with Outlook, Outlook Express, Thunderbird, Eudora and more.

MailCloak uses the Gnu Privacy Guard so it’s compatible with tons of other GPG programs on any platform you can think of.

Easily send secure, encrypted email with eCipher.
eCipher allows you to send and read encrypted messages directly through your existing desktop email client (Outlook, Thunderbird, Eudora). The current version supports reading encrypted mail from any webmail client (Gmail, Yahoo!, AOL, etc.). eCipher protected emails utilize strong encryption and digital signatures, ensuring that they can only be opened by the intended recipients. eCipher also provides extra security options for your email, including the ability to prevent message forwarding, copying, or printing.

Download the eCipher Beta for free today!

Sending never again unencrypted emails.
With abylon CRYPTMAIL offer abylonsoft a window and Outlook AddIn for email encrypting (incl. Attachments). Only the owner of the private key (HYBRID-System) or the correct password (SYMM-System) can open and read the protected emails. For any other person the content is locked. For the business use provide abylon CRYPTMAIL so-called Secure Message Envelops (SME), the signing and encrypting in one step.