Missouri S&T Mail Services operates a courier service to the Columbia campus each business day. The courier exchanges inter-campus mail with couriers from UMKC and UMSL and with MU Mail Services. Depending on driving conditions and other factors, the Missouri S&T courier typically arrives back on campus about 10:30 AM when sorting of the mail load begins.

An after-hours drop box for the courier is available at the rear of the Campus Support Facility Building for Missouri S&T campus use after 4:30 PM on business days. To be included in that day's courier run, the mail must be in the box prior to 6:00 AM .