Yes! There are thousand of online dispensaries located in USA that are NOT operating under the federally-approved medical marijuana system. Fed have allowed dispensaries to proliferate so people can safely access medicine, so long as there are no sales to minors or any gang affiliations.
Legal Weed Fly have honestly been shipping weed in the mail since 2011 to date, we know of no-one who has ever been charged with receiving pot in the mail.