Sadly, this is such a weak requirement, because if they have access to the post office, then it is nothing to get them stamped for whatever date you need. Democrat controlled counties parishes or whatever, have no issue with having post office access whenever needed.
The integrity can really only be maintained by an honest system. Meaning that everyone has to be committed to honest people working within the system. That has ceased to exist for decades now, extending all the way back to JFK vs. Nixon, and perhaps even longer. It has just gotten worse as the country became more divided. This will not end well.
That is true, but for this election, that is not a base the enemy has covered. If courts rule against the current crop of fraud, we have a shot to correct this hole in the next two years.