What is the maximum weight for letters sent through Express Mail?

The maximum weight for letters sent through Express Mail is 70 pounds. However, in the context of the choices provided, the practice exam likely focuses on a different aspect of mailing classifications.

Express Mail is designed for expedited delivery and allows for the mailing of letters and documents as well as packages. When it comes to the weight specifically for letters, it is important to note that the priority is on speed and reliability, often with a maximum weight limit that is higher than typical standard letter services.

In many contexts, letters can be generally mailed as non-machinable if they exceed certain weights or dimensions. However, within designated guidelines for specific services like Express Mail, the weight limit tends to exceed the choices listed.

Thus, if this exam suggests a maximum weight of 1 lb for Express Mail letters, it may be reflecting a specific classification of lightweight mail or a conceptual focus on general letter standards rather than the maximum allowable weight for all Express Mail items eventually. It's essential to cross-reference with the most recent postal service guidelines for accurate and updated information on mailing policies.