First Email Ever Sent Anywhere

Some messages change the world. Speeches are carved into stone, and first words spoken on the Moon are memorised by schoolchildren. So it is natural to ask what the very first email, the first message ever sent from one computer to a different computer, actually said.

The honest answer is delightful: nobody knows. Not historians, not museums, and not even the man who sent it. Ray Tomlinson, the engineer who invented network email in 1971, spent the rest of his life cheerfully admitting that the most important message of the computer age had slipped completely out of his memory. The first email in history is a message that its own sender forgot.

Two machines, one room, in Cambridge

The setting was a laboratory of Bolt Beranek and Newman, usually shortened to BBN, in Cambridge, Massachusetts. BBN was the company building much of the machinery behind ARPANET, the experimental network that came before the internet. Sometime in November or December of 1971, Tomlinson sat down to test an idea he had been quietly building.

The test was almost comically small. He sent a message from one computer to another computer sitting only a few feet away in the same room. The two machines were connected through ARPANET rather than by a simple cable, and that was the entire point. The distance was nothing. The idea was everything: a message had left one computer, crossed a network, and arrived inside a mailbox on a completely different machine, where its owner could read it whenever he pleased.

That second part mattered more than it sounds. A telephone forces both people to be present at the same moment. Tomlinson later explained that he wanted a method of communication that did not require the other person to be there when the message was sent, so the receiver could read and reply at a convenient time. Every email you have ever sent works on exactly that principle.

Gluing two programs together

Tomlinson did not start from an empty desk. Since the 1960s, big shared computers had allowed their users to leave messages for one another, like notes pinned to a corkboard inside a single machine. At BBN there was a program called SNDMSG that did this job: it let you leave a note for another user of the same computer, who would find it waiting in a mailbox file when they logged in.

The limitation was obvious. The note could never leave the building, because it could never leave the machine. Separately, Tomlinson had been working with an experimental program called CPYNET, which could copy files between computers across ARPANET. His insight was to join the two ideas together: take the message-writing program and give it the file-moving program’s legs. The result was a version of SNDMSG, with a companion reading program, that could deliver a note to a mailbox on any computer on the network.

Being fair about the history, Tomlinson himself was the first to point out that other clever people had sketched versions of this idea, and that message systems inside single computers had existed for years before him. Even the BBN community had been discussing a complicated official proposal for network mail, which Tomlinson read and decided he could do more simply. What he built in late 1971 was the version that actually worked, worked elegantly, and spread. That is why his name, fairly, is the one attached to the invention.

The early test messages were pure rehearsal: a few meaningless characters typed to see whether anything arrived at the other end. Once the system proved itself, the first substantial message Tomlinson sent was an announcement to his ARPANET colleagues explaining that network mail now existed and teaching them how to use it. In other words, the first email anyone can remember was an email about email.

The little symbol that became immortal

Network mail created one problem that local mail never had. If a message could go to any machine, the address had to say two things at once: which person, and on which computer that person could be found. Tomlinson needed a character to sit between the user’s name and the machine’s name, and he found it by studying the keyboard of his Model 33 Teletype.

His own account of that moment is wonderfully plain. He asked himself what he could choose that would never be confused with a username. People did use commas, slashes and brackets in names, so those were out. Of the few characters remaining, one stood out: the @ sign. It literally meant “at,” so an address could be read almost like a sentence: this user, at that computer. He liked to call it “the only preposition on the keyboard.”

Before email rescued it, @ was a fading symbol. Bookkeepers had used it for centuries on invoices as a shorthand for unit price, the sort of thing you would see in “10 pencils @ 15 cents.” It sat on typewriter keyboards doing very little, and, as his employer Raytheon later put it, Tomlinson saved the @ symbol from probable extinction. He gave that half-forgotten squiggle less than a minute of thought, and it became user@host: the shape of every email address on Earth, unchanged for more than fifty years.

Older than the internet, older than the web

Here is a fact that bends most people’s sense of the timeline. Email is not a product of the internet age. Email came first, and the internet followed it.

When Tomlinson sent his test messages in 1971, the network was still called ARPANET, and it would not adopt the TCP/IP rules that define the internet until 1 January 1983, more than eleven years later. The World Wide Web arrived later still: Tim Berners-Lee invented it in 1989, roughly eighteen years after that first forgotten message, and it opened to the public in the early 1990s. So the first email predates the thing most people picture when they say “the internet” by about two decades. Long before anyone browsed a page, people were already writing to each other through the wires.

Email also grew up fast. Within a couple of years it had become the surprise star of ARPANET. Larry Roberts, the director of the government agency behind the network, began running his own office communication by email, and before long more than 75 percent of everything moving across ARPANET was email. The network’s builders had imagined scientists sharing computing power. What the scientists actually wanted, it turned out, was to talk to each other.

From forgotten line to planetary flood

The years after 1971 added the furniture of the inbox you know today. In 1973 Tomlinson co-wrote RFC 561, the first standard describing the format of email messages, which settled fields still printed at the top of every message: From, Subject and Date. In 1982, the mail-carrying duties passed from the old file transfer system to a dedicated protocol called SMTP, which still delivers email now. In 2012, Tomlinson was inducted into the Internet Hall of Fame in its very first class, alongside pioneers such as Vint Cerf and Tim Berners-Lee. He died in March 2016, having watched his side experiment become a habit of the entire species.

The scale of that habit is hard to hold in your head. Analysts at the Radicati Group estimate that in 2026 roughly 392 billion emails are sent and received around the world every single day, by about 4.7 billion users. That is an estimate, not a count, but even the roughest version of the number is staggering: millions of messages every second, carrying job offers and wedding invitations, receipts and apologies, reset codes and love letters, spam and scams and birthday wishes.

Personally, I find something perfect in the fact that the first message is missing. Email was never meant to be a monument. It was a tool built for ordinary words, typed quickly and read later, and its inventor treated that very first line the way we treat most of our own messages: he sent it, it worked, and he moved on. The monument happened anyway. It is sitting in your pocket right now, and somewhere in its endless river of messages, your own inbox is the direct descendant of a forgotten line of test characters, typed between two machines in one quiet Cambridge room.

Questions people ask

What did the first email say? Nobody knows, including its sender. Tomlinson said the early messages were all throwaway tests, typed with whatever characters came to hand. The guess repeated most often is “QWERTYUIOP,” the top row of the keyboard, and Tomlinson himself said that may or may not be what it was. The content is honestly lost to history.

Why did Tomlinson choose the @ symbol? He needed one character to separate the person’s name from the computer’s name. Studying his teletype keyboard, he found that @ was not used in people’s names, was not needed by the system for anything else, and best of all meant “at,” so user@host read like plain language. He later called it the only preposition on the keyboard.

Was email really invented before the internet? Yes, in the practical sense. Network email began on ARPANET in 1971. The internet in its modern form is usually dated to 1 January 1983, when ARPANET adopted TCP/IP, and the World Wide Web was invented in 1989. Email is older than both.

Who received the first email? Tomlinson himself. His tests were sent from one BBN computer to another a few feet away, addressed to his own mailbox, simply to prove the delivery worked. The first message with real content announced the new system to his ARPANET colleagues and explained how to use it.

How many emails are sent today? The Radicati Group estimates that around 392 billion emails are sent and received worldwide each day in 2026, across roughly 4.7 billion email users. Treat the exact figure as a well-informed estimate rather than a precise count.