Priority Mail and Express Mail boxes, however, are very easy to see. Use them when shipping or put something colorful on your mail when other packaging is necessary.

If you plan to ship a package using retail ground service or first class, USPS recommends you send your package in by Dec. 17. If you plan to use Priority Mail Services then you should mail your ...

Tuesday is the last day to ship packages using Priority Mail Express for expected delivery before Christmas, according to the post office.

If you plan to use Priority Mail Express service, you can send them by Dec. 21, the postmaster writes. Also, letters on public transit, the "senior freeze" and the Bears.