The United States Constitution gives congress the authority to establish post offices. It's not something the executive branch is meant to have control over. With the upcoming election on the horizon, some people have grown worried that the president is going to interfere with mail-in ballots.
During this pandemic, it is much safer to absentee vote or use drop boxes where available to decrease the amount of people you see. Over a dozen states have drop boxes now and they've proven themselves to be secure.
Washington and Oregon have used drop boxes for years without problems. The last presidential election saw around 1 in 6 of the votes nationwide came from drop boxes. An SUV even ran into a drop box and the drop box's contents were still secure after being hit.
We all want a fair election where everyone's voice is head, so vote early to make sure that your vote gets counted.