The law on this is abundantly clear and explicit. Any postal employee complying with Trump's EO on ballot delivery is committing a crime under US Code 1703
Polite Yet Ultimately Malevolent Mailman
USPS will not deliver mail ballots to voters from any state that refuses to turn over voter rolls to the federal government. Twenty-three states and various advocacy groups are suing to block the unconstitutional trump election EO.
State election officials could soon face a stark choice: hand over voter lists to the Trump administration or risk losing Postal Service delivery for mail-in ballots.