Currently, USPS has temporarily suspended acceptance and delivery of international mail items.
When will International Service resume?
LOOK, UP IN THE SKY ! It's a bird! It's Superman ! It's a plane !!! [How RARE ! ]
When you start seeing contrails in the sky like normal...check back.
A HUGE backlog of packages have piled up in the Miami Distribution Center since the beginning of March.
As with any pile, they get un-piled from the top down...first in, last out.
Since no airplanes are flying, the postal service has loaded up shipping containers and put them on ocean going ships ["Slow boat to China"]
You can do this in a pinch...