The U.S. Embassy in Buenos Aires requires mail transportation services under a fixed-price contract, with performance between Ezeiza and Buenos Aires, Argentina. The solicitation is not yet ready for issuance but will be posted on SAM.gov. All interested sources may submit offers, and the government may award based on initial proposals without discussions. Contractors must be registered in SAM prior to proposal submission. Electronic submissions are required, with offers sent to specified email addresses.