I purchased 4 new rifles in the past 8 weeks, all from different CGN site sponsors, all using CanPost. They were all shipped in their original factory cardboard boxes, no locks on any of them. The two bolt actions did have their bolts removed.
I have shipped 2 rifles this month with my CanPost business account. I won't describe in detail how I packaged and shipped them, but monkey see, monkey do.
From the C.P. website:
When you ship firearms, you must:
Unload the firearms. There can’t be any ammunition in the firearm or in the package (bullets, cartridges, and other ammunition are dangerous goods).
Attach a secure locking device to the firearms.
Lock the firearms in a sturdy, non-transparent container.
Remove the bolt or bolt carrier from any automatic firearms (if removable).
You can’t:
Ship firearms via air
Have any markings on the outside of the firearm packaging
You’re solely responsible for meeting all government regulations.