John Mayer on his blog has written the following...
"I was sitting in the airport lounge this morning when I started scribbling out lyrics and such…
Don't read too far into this on a personal level. (There are no hidden messages)… I just thought it sums up how crazy love can be.
Dear Ex Lover,
Perhaps you didn't understand the last time I told you to stop contacting me, so I'll do my best to spell it out for you. I do not wish to have you in my life anymore. I don't know how much more clear I can be about it. It would serve you best to move on with your life and find someone who can put up with you, because I'm done trying.
I hope this is enough closure for you.
Goodbye.
P.S. If you need me, you know how to find me."