Systems to track the progress of ballots through the mail can also inform voters if their ballots are rejected, and give them a chance to correct the rejection.

This is a crucial job, but it sounds like that is done digitally, which means it may depend on nonfree software. These systems should not lock the voter into running specific software either to ask for notifications or to "cure" a rejection.

If you are a Colorado voter and you would like to help test this, would you please write to me now?