It does not matter. Tell them regular mail never arrive at home and can easily be lost in transit. It happened to me before.
Tell them that you are willing to pay courier charges. Then, they will send you a dhl canada address where you can arrange your shipment to be picked from college by paying courier charges online.
you see, 6 weeks was a timeline given by a cad university to me . it has been three months now. No regular mail arrived at home. I was smart enough to smell a rat and told them to send it by a courier. I got it in 4 days.
I'm from Pakistan.