The message you just sent was encrypted by 2048 bit GnuPG (OpenPGP). The recipient should recieve an encrypted message within the next minute or two. If you're not familiar with encrypted messages, they look something like this:

-----BEGIN PGP MESSAGE-----
Version: GnuPG v0.9.9 (GNU/Linux)
Comment: For info see http://www.gnupg.org

hIwDqImEVGd1/vUBBACWhVk0geS02DgvN+A4ETrGAFMFPS5A6Tl/Z+izB2zsCY46
G2LmmildYBb9A8Jq4vje2AHHQwviUUy6l5Q4ISBaYQMZbdcMDEQWAluqWGRAGi8/
ob8IEmlFY6naFJbS69pHhnXG9E60H1Occ89QXgLqlu13ebeIjVVfHovVLGkPkaYA
AAC7J8U+ozUBKZE3eIwJXvq3oyFYGbv+JLJR5oLWFYJZS+pUDkimn1aMcK1+uwHF
o64d4IaVATP20rCZD18+LZGJvdq3R0wRq2g0D7Y8FaWMjreZZ9PQOclzlvbQMeIj
/R8IEQTj1x1GYbgmYTCSvbPnRQRpmY+yzxLu7/aUSip/wL+fsL1K6/+adRpLQNGJ
jX4pqrhxel8dC4la6ptNleywnoY9hJ+DI5VyN2Jqo248mcEu5M5xwc8gDmGzVg==
=KtPICwMCAQAKCRBHwbOP0ShOFvz0AJwPI8LE2f013rycqXeHrKb+YA+e0wCdGOY
9BTe7k15ZUjv9GuAgxG5AQ0EN7BLixAEANuo6jZIiPRnUljOgjyx9Q6/yT2KZ3c2
7QjxetHu4ew+Ma180CyLQDNKnIoNA+Iv6ESt4A5um7ieFdKfK2KEGjio72CPHjw5
2RTNIQ3m4OQVcuYzOBzWHCwGcMab0RjmmSjGZ55a+1tobSkSBTJ0G2KMPeQQ/b1B
-----END PGP MESSAGE-----

To decrypt this message, you need to have a version of pgp or gpg installed on your computer. In addition, you would need to have the recipient's secret key as well as the pass phrase. (No, the secret key and pass phrase are not publicly available!)