I did find the address, but so far I haven’t found an email. I’ll keep trying.
The Office of the Commissioner of Baseball
Allan H. (Bud) Selig, Commissioner
245 Park Avenue, 31st Floor
New York, NY 10167
Phone: (212) 931-7800
Selig also maintains an office in Milwaukee in the First Wisconsin/Firstar building.
Baseball Commissioner Office
777 East Wisconsin Avenue
Milwaukee, WI 53202-5302
(414) 225-8900