Here is my mailing address from August 2010 to 2011! Envelopes and packages sent to this address come straight to my office in Peace Corps. Postcards and envelopes mailed First Class from the United States to Mongolia cost 94¢, so that's not too bad. Also, if you are planning to send a package, I highly recommend the Flat Rate Boxes offered by USPS. They have unlimited weight and often are a much better deal than First Class. I would love to hear from you while I am here in Mongolia and look forward to writing you and sending you postcards!