is a news writer who covers the streaming wars, consumer tech, crypto, social media, and much more. Previously, she was a writer and editor at MUO.
When you crack open your mailbox, it’s almost as if your letters just appear. Long before the days of speedy, overnight mail deliveries, postal service workers meticulously sorted through letters by hand and transported mail on horseback. For more than 250 years, the US Postal Service has worked behind the scenes to build a faster delivery network, and this mission has quietly pushed it to the forefront of technology.
“Most people treat the Postal Service like a black box,” USPS spokesperson Jim McKean tells The Verge. “You take your letter, you put it in a mailbox, and then it shows up somewhere in a couple of days. The truth is that that piece of mail gets touched by a lot of people and machines and transported in that period of time — it’s a modern marvel.”
One of its big breakthroughs took place in 1918 with the introduction of airmail. The USPS worked with the Army Signal Corps to use leftover World War I aircraft to launch the service, and the planes were as barebones as they could get. An excerpt from a 1968 issue of Postal Life called the early aircraft “a nervous collection of whistling wires” with “linen stretched over wooden ribs, all attached to a wheezy, water-cooled engine.”
JR-1B mail planes were the first used by the USPS (1918). Photo: National Archives and Records Administration
At the time, pilots literally risked their lives delivering mail — 34 of them died between 1918 and 1927. “There was no commercial aviation, no airports. There was no radio. There was no navigation,” USPS historian Stephen Kochersperger says. “The Postal Service had to develop all of those things just for getting the mail delivered.”
Once the USPS established that it could reliably deliver mail by plane, Congress allowed it to contract airmail service to commercial aviation companies, laying the groundwork for the major airlines that we know today, like American Airlines and United Airlines. Along with getting paid for delivering mail, contractors found that they could make even more money by carrying passengers with their cargo. “That was where commercial aviation took off,” Kochersperger says.
Airmail routes gradually began to expand internationally, first to Canada and then to Cuba. But a couple decades later, the USPS experimented with a novel form of delivery: mail-by-missile. In 1959, the USPS and the US Navy loaded a Regulus I missile with two mail containers that had 3,000 letters in total. The missile traveled 100 miles in around 23 minutes, successfully landing at a Navy base in Mayport, Florida, with the help of a parachute. Despite its success, the idea never took off. It turns out missiles just can’t carry that much mail. And overall, this rather ridiculous demonstration was more of a stunt to show force during the Cold War, according to the Smithsonian.
The Regulus I missle carried 3,000 pieces of mail (1959). Photo: Collection of United States Postal Service
Back on the ground, the USPS set its sights on improving the speed of mail processing. Though it began experimenting with a mail canceling machine in the 1920s, which put a mark on used postage, it wasn’t until the 1950s that it deployed an electromechanical sorting machine. Instead of manually sorting mail using the “pigeonhole” method, in which workers would insert pieces of mail into different compartments inside the post office depending on the address, the machine could do that for them.
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