Detailed breakdown of USPS First-Class Mail 2025 changes: zone-based pricing (up to 30.9% increases), new size rules, rigidity fees, slower delivery, and actionable strategies to save money. Essential guide for businesses and personal users.
Avoid mailing disasters! The definitive guide to USPS state abbreviations, including territories and military codes. Learn common errors like MS vs MO, historical quirks, and practical usage tips for taxes, mail, and legal documents.