The joke was just on putting the Lorem Ipsum on the text.

The email issue is true.

That's weird - I sent invitations ("Invite a Friend") to email boxes that are read in GMail, Outlook, Hotmail and a private webmail. GMail still shows <unknown sender> as the sender, but the Outlook, Hotmail and the priv webmail goes fine. Did somebody had this problem? I'm afraid that GMail will understand a message with no sender as a span, and so make me get blacklisted...