I have yet to see a cogent explanation of why early voting and voting by mail need cause a problem, especially one of "bulk fraud." Mail inherently limits ballots to voters who are registered and whose addresses are on record and who have indicated their intention to vote. At least where I am, the ballot is doubly enveloped, signed, and doubly sealed. Drop boxes are available for those who don't trust the mail. It's no harder to check a returned ballot against registration rolls than it is to confirm the identity of a person you may never have met, and if ambiguity exists there's more time to resolve it, and less likelihood of throwing away valid votes. Persons who believe their mail in ballots have been tampered with or compromised, or who change their minds, are able up to poll closing to request that their mailed ballots be invalidated, and to vote in person instead.