Saw this on the US Postal Service site this morning:
Effective Nov. 29, 2024, the Postal Service will temporarily suspend international mail acceptance to Canada due to the foreign postal operator indicating that they are unable to process or deliver international mail or services as a result of the ongoing national strike by the Canadian Union of Postal Workers.
Customers are asked to refrain from mailing items addressed to the following country, until further notice:
This service disruption affects Priority Mail Express International® (PMEI), Priority Mail International® (PMI), First-Class Mail International® (FCMI), First-Class Package International Service® (FCPIS), International Priority Airmail® (IPA), International Surface Air Lift® (ISAL), Commercial ePacket® (CeP), and M-Bag® items.
- Canada
The Postal Service is closely monitoring the situation and will continue to update customers until the situation returns to normal.