The student 'mailboxes', which are actually folders for intercampus messages, are located in a large cabinet near the study rooms on the First Floor North. There is also a mail slot here for outgoing U.S. mail.
Students who live on campus will receive their U.S. mail in their personal mailboxes near the Great Hall, across the street.
If you receive an email that you have a package in the library, you may ask for it at the Circulation Desk. Be sure to have your i.d. with you.