Postal regulations are rules set by postal services to ensure the safe and efficient delivery of mail and packages. These regulations cover various aspects, including acceptable items for mailing, packaging requirements, and postage rates. They help maintain order and security within the postal system, ensuring that all items are handled properly. Additionally, postal regulations often include guidelines for international shipping, such as customs declarations and restrictions on certain items. Compliance with these rules is essential for both senders and postal workers, as it helps prevent delays and ensures that mail reaches its destination without issues.