Mail Services has several types of distributions which will help you in picking the recipients:
All Campus (includes Facilities and Dining Services)
Faculty and Administration
Regular Distribution (does not include Facilities and Dining Services)
Departmental/Offices (one per each department/office)
The Print Center has the counts if you get your distribution printed there. Be sure to let them know the date you want the distribution to be put in the mailboxes.
Distributions with names on them must have a label stating the recipient's name and department. Ask for the labels in alphabetical order by the department.
All offices are closed on Saturday and Sunday
Scheduled hours may vary during exams, breaks, and holidays.