Mail in the United states is handled by USPS. To forward your mail or change your address fill out the Mover's Guide on USPS's website.
For a complete lists of prices and rates go to http://postcalc.usps.gov/.
Update 16/05/2008
When you move internationally you are taking a big step. Lots of things are changing and you have a million things to think about and take care of. If you are able to select a top of the line moving company that moves for a modest price, it can take a big weight of your shoulders in busy times.
Our network of international removal companies can move your furniture & possessions to United States and anywhere overseas.
Filling in the form will allow you to request up to 5 quotes from various moving companies. This service is free of charge and will help you select an international moving company that suits your needs and budget.