10pn mail

You're referring to the 10pm mail!

In the United States, the 10pm mail refers to the last collection time for mail and packages by the United States Postal Service (USPS). This means that if you mail a letter or package by 10pm, it will be considered as having been mailed on the same day, and the USPS will process it accordingly.

The 10pm mail cutoff time is in place to ensure that mail and packages are collected and processed in a timely manner, allowing for efficient delivery to their destinations.