the.com/mailman

Delivers your future, your past due notices, and one dog's nemesis, daily.

means A person employed to collect, sort, and deliver mail to homes and businesses, typically on a set daily route.

from A straightforward compound of 'mail' (the postal system, from Old French 'male,' a traveling bag or pack used to carry letters and dispatches) and 'man.' The job and word solidified in the 1800s as organized postal services expanded, with 'mailman' becoming the common American term — now often replaced officially by 'mail carrier' or 'letter carrier' to reflect that the job was never limited to men.

origin
term predates widespread female carriers by decades
dog bites
usps logs about 5800 carrier bites yearly
route math
average carrier walks 5 to 8 miles daily
official title
usps now says letter carrier, not mailman
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