From the linked story:
Attributed to USPS spokesperson Steve Doherty
Regarding message successful South Boston, the Postal Service is alert of allegations of mishandling of mail, including immoderate pieces of Political Mail, by an employee. No Election Mail, specifically ballots oregon ballot materials, were involved. All run mailpieces were recovered and returned to the mailstream.
I figured it was worthy highlighting that determination was election-related message that was mishandled, but not existent "election mail" which would see ballots. So the allegations of ballots being mishandled is hopefully much of a mistaken item alternatively than an outright fabrication.