The embassy.org program is aimed primarily at providing Internet access to and for the foreign embassy community in Washington D.C., though pointers are provided wherever possible to other diplomatic facilities, embassies and missions abroad. The embassy.org program is a project created by Stapleton-Gray & Associates, Inc., and is not a part of the U.S. Department of State.
The State Department is taking steps to provide greater access to the Internet to its employees, as are other Federal departments, agencies and bureaus. There is no directory as yet of E-mail addresses, and the State Department's traditional lists, such as the Key Officers List detailing staffing of U.S. embassies abroad, do not provide any. Some of the overseas mission Web pages will have a Webmaster whom you can reach and who might be able to help.
It may very well be possible for friends and colleagues at foreign embassies to reach you via E-mail, either through access to the Internet at work, or through a private E-mail account... a good idea is to attempt to reach them through whatever means you do have, and ask if they could respond to your E-mail address.