The USPS is adjusting service standards for first-class mail, periodicals, marketing mail, and package services. It will deliver 75% of first-class mail at the same service standard, 14% will be ...

The USPS said a postmark reflects the date an envelope is first processed by an automated USPS sorting machine — not the actual drop-off date.

See if first and second-class stamps with the late Queen Elizabeth II's head on are still valid - Royal Mail explains ...