What is wrong with Facebook?

[help me pls]

So I need to message this person but do not have them as FRIENDS. when I click message, it says that the message will go to his OTHER BOX because I am not connected with them on Facebook. I type the message then when I hit send it says: "One or more of your email addresses are not valid. Please try again." why cant I send the message and how do I fix it. I already confirmed the email tanx in advance

[jesssymes]

Just request him as a friend. Or just email him instead?!

[Bradley]

Why don't you just request them as a friend? That should work better