"It also warned that any new mail likely won't make it to its destination by Christmas, and delays are expected to continue into January.

"It's going to take some time to ramp up again. It's not like just plugging a fridge back in," company spokesperson Jon Hamilton said Monday."

The Canadian post office won't accept new mail until Thursday while they work to clear out a month-long backlog. I haven's seen when the USPS will start accepting northbound mail again