 The USPS, successor to the U.S. Post Office, officially ended International Parcel Post service in May 2007 after some 120 years of existence.International Parcel Post service was replaced by First-class Mail International service for parcels up to four pounds.For heavier parcels and/or printed matter, Priority Mail International, Priority Mail International Flat-Rate, Express Mail International, Airmail M-Bags, and Global Express Guaranteed service is available to foreign countries allowing these types of mail delivery.