The DNC already has millions of ballots already printed and filled in for Biden in the hopes that "vote-by-mail" is allowed. If so, the DNC will simply mail in the ballots and they will have to be counted. It doesn't matter at all how the post office mails out blank ballots ... all that matters is that all of the millions of fraudulent ballots will be mailed in and will have to be counted. They won't have names on them because they are supposed to be anonymous.
In short, the election is already rigged ... the DNC just needs the green light to dump them into the mail system and this election is over and Biden wins ... unless the Republicans cheat even moreso by mailing in even more fraudulent ballots than the DNC.
Hopefully, voter fraud will be averted and "vote-by-mail" will not be allowed.