First, a mailer could find that mail presorted and/or barcoded zips through the system without delay while other mail, which needs more postal attention, is either delayed or is unpredictable.
There are barcoded zips on all the mail.
mnli hypothesis: There are barcoded zips on all the mail. premise: First, a mailer could find that mail presorted and/or barcoded zips through the system without delay while other mail, which needs more postal attention, is either delayed or is unpredictable.