Not to be confused with a similarly names WordPress plugin (Mailster, email newsletter plugin for WordPress), these were hot in the 60s!
Smithsonian Institution from United StatesUploaded by PDTillmanUnidentified photographer, No restrictions, via Wikimedia Commons
It was kinda wild to drive, too!
Often known as “mail scooters”, Mailsters worked best in areas with warm climates and flat terrain. The two cylinder gasoline-powered vehicle had a safe top speed of 35 miles per hour and a 7.5 horsepower engine. A Mailster could be rendered useless in just three inches of snowfall. Mail carriers often complained of frequent breakdowns ranging from clutch failure to broken front axles. If a Mailster rounded a corner too quickly, it was also prone to tipping over.