Oil prices jumped and stocks plunged after Iran and Israel exchanged strikes, raising doubts about the future of fragile cease-fire in the Middle East.
The agency had warned it could run out of money within months, but its regulators said suspending payments to a retirement fund had given officials more time to find a permanent solution.
The U.S. Postal Service has raised prices and slowed delivery standards in recent years as it struggles to stanch declining mail volume and rising structural costs.