I'm on a roll here, so forgive me.
This was emailed to me:
Dear Ms. Perkins,
I recently sent your agency a query letter and it was returned to me. I was wondering if I had the correct address or not. The one I used is:
16 W. 36th Street
New York, NY 10018
as I saw it in the 2006 Writer's Market, Deluxe Edition. If it has changed can you please E-mail me the correct address.
I would greatly appreciate it. Thank you for your time."
So this author emails me to ask for a snail mail address when it clearly states in the 2006 Writer's Market that I take email queries, which is how she got my email address in the first place.
On top of that, she should have googled me for the new address.
This, of course, is also why you should always use up-to-date guidebooks when you are submitting your work. The 2006 guidebook was compiled in 2005.