A threatening email sent by Elon Musk to millions of federal employees on Saturday backfired after opponents of the billionaire began spamming his inbox. In the email, Musk ordered government workers to respond with their weekly accomplishments by the end of Monday or face potential termination.

The lawmakers said in a letter that agency heads should immediately tell staffers to not respond to OPM’s “ill-conceived email stunt” asking them what they accomplished last week.

Musk fumed—and issued another threat—after federal workers were told they didn't have to comply with a demand to justify their jobs.

Current and former OPM employees describe an agency that’s been taken over by a shadow operation of political appointees affiliated with Musk’s Department of Government Efficiency, or DOGE.