"This is not a business," Pelosi said at a news conference in San Francisco, California. "It is called the Postal Service."
DeJoy on Tuesday suspended changes at the Postal Service until after the November election, bowing to an outcry by Democrats that the moves appeared to be an attempt to boost President Donald Trump's re-election chances.
Pelosi called DeJoy's announcement inadequate and said she would push ahead with legislation later this week to aid the Postal Service.
"This pause only halts a limited number of the postmaster's changes, does not reverse damage already done, and alone is not enough to ensure voters will not be disenfranchised by the president" in the Nov. 3 election, Pelosi said in a statement.
"The House will be moving ahead with our vote this Saturday," she said. The legislation is expected to contain provisions to prevent the post office from reducing service levels below what they were in January.