The best option is to forward the mail from your old address to the new one.
Canada Post offers a Mail forwarding service for $86.80/year (assuming it’s from a residential address to another residential address). If the forward is to an address out of the province, then the fee is $108.80/year.
It’s important to keep in mind that Canada post does not forward parcels.
You can buy the service online at Canada Post official website.
I hope I answered your question.