There is only one email disclaimer, and it's this one!
My favourite email disclaimer is from Wendy Grossman, a folk singer from the past who, I last heard of, was an IT Journalist working for the broadsheets as a freelance, but that was a few years ago.
Here it is:
*DISCLAIMER -* This email is not and cannot, by its nature, be confidential. En route from me to you, it will pass across the public Internet, easily readable by any number of system administrators along the way. If you have received this message by mistake, it would be ridiculous for me to tell you not to read it or copy to anyone else, because, let's face it, if it's a message revealing confidential information or that could embarrass me intensely, that's precisely what you'll do. Who wouldn't? Likewise, it is superfluous for me to claim copyright in the contents, because I own that anyway, even if you print out a hard copy or disseminate this message all over the known universe. I don't know why so many corporate mail servers feel impelled to attach a disclaimer to the bottom of every email message saying otherwise.
If you don't know either, why not email your corporate lawyers and system administrators and ask them why they insist on contributing so much to the waste of bandwidth?