An in-depth explanation of third-class mail, also known as standard mail, often used for bulk and non-priority communications.
EXPRESS MAIL next-day delivery guaranteed for shipments between major U.S. cities, available from the U.S. Postal Service for letters or packages of up to 70 pounds. Postage costs vary by weight, distance, and specific type of Express Mail used.
First-Class Mail is a class of mail service that receives quick handling and delivery, free forwarding, and is not subject to opening for postal inspection. Letters, postcards, bills, and personal correspondence must be sent by first-class mail.
A comprehensive guide to understanding metered mail, its mechanisms, benefits, and uses in modern postal services.
Parcel Post is a class of mail service offered by the U.S. Postal Service for sending merchandise or printed matter weighing more than 16 ounces. The service includes postal inspection, with specific weight and size limitations, as well as special rules for certain items.
