The short answer is: no, it’s illegal to ship marijuana products and edibles within the United States. At the time of writing, marijuana is still a federally illegal substance which means that it is illegal in the eyes of the federal government. The United States Postal Service (USPS), as well as other private postage companies, are managed and controlled by the government. If there is any criminal activity that has been discovered, coursed through the mail, can lead to federal criminal offenses, which are discussed in the United States Code 1716.