Security Levels

○ Signed. The message is signed with the sender's private key. Sending a message with a digital signature confirms the message was sent by the sender listed in the From address.

○ Encrypted. The message is sent with the recipient's public key. The recipient provides you with his or her public key before you send the message. When a message is encrypted, the body and attachments are hidden from anyone who does not have the recipient's private key. Only the recipient should have the recipient's private key. An encrypted message does not guarantee to the recipient that the sender is the name in the From address.

○ Signed and Encrypted. The message is signed with the sender's private key, confirming for the recipient the message was sent by the sender in the From address, and it is encrypted with the recipient's public key and then decrypted with the recipient's private key when he or she receives the message.