Why the First Email Was Sent and How It Changed Everything

Why the First Email Was Sent and How It Changed Everything

Ray Tomlinson sent the first network email in 1971 on the ARPANET, choosing the @ symbol to separate user names from computer names. He later said he had no idea it would be revolutionary — he was just solving a practical problem: two people on different computers needed to exchange messages. Within 50 years, email would become the foundation of modern business communication with 4.3 billion users worldwide.

The First Email

Ray Tomlinson (1971):

• Working at BBN Technologies on the ARPANET project
• Problem: Users could only send messages on the SAME computer
• Solution: Modified an existing file transfer protocol (CPYNET) to send messages between computers
• Chose @ as the separator between user and host (it was rarely used in computing)
• The first email was a test message — Tomlinson later admitted he doesn't remember what it said (probably just "QWERTYUIOP")
• The receiving computer was right next to the sending computer — but the message traveled through the network

Email's Evolution

1971-1980s (Academic era):

• Email was primarily used by researchers and academics on ARPANET
• 1978: First spam email sent (Gary Thuerk, DEC — advertising DEC computers)
• 1982: SMTP protocol standardized (Simple Mail Transfer Protocol — still used today)
• Email addresses standardized as user@host.domain

1990s (Commercial era):

• 1993: AOL made email mainstream ("You've Got Mail")
• 1996: Hotmail launched (first free web-based email)
• 1997: Yahoo Mail launched
• 1998: Gmail concept developed (launched 2004)
• Email went from academic tool to mass consumer product

2000s (Web era):

• 2004: Gmail launched with 1GB storage (revolutionary at the time — competitors offered 2-15MB)
• 2004: Gmail's threaded conversations changed how people read email
• 2007: iPhone made mobile email practical
• Spam became a massive problem (90%+ of all email was spam at peak)

2010s (Cloud and mobile era):

• 2010: 3.9 billion email accounts worldwide
• Email became the backbone of business communication
• Cloud email (Microsoft 365, Google Workspace) replaced on-premises servers
• Marketing automation transformed email from communication to business channel

The Numbers Today

• 4.3 billion email users worldwide (2024)
• 347 billion emails sent per day
• 333 billion of those are SPAM (96%!)
• 126 business emails received per person per day (average office worker)
• Business email market: $1.2 billion annually
• Average person checks email: 36 times per hour (every 100 seconds during work hours)
• Time spent on email: 28% of the average worker's day
• Expected email response time: 12 hours (internal); 24 hours (external)

How Email Changed the World

Business communication:

• Replaced memos, fax machines, and physical mail
• Enabled asynchronous communication across time zones
• Created the "always-on" work culture (email follows you everywhere)
• Email became the primary business record and legal document

Personal communication:

• Before email: Letters took days/weeks; phone calls required both parties available
• Email enabled instant written communication worldwide
• Enabled relationships and business partnerships across distances
• Later supplanted by messaging apps (WhatsApp, iMessage) for personal use

Marketing and commerce:

• Email marketing: $42 ROI for every $1 spent (highest ROI marketing channel)
• Email newsletters became a primary content distribution channel
• E-commerce transaction notifications (order confirmations, shipping updates)
• Email addresses became the universal digital identity

Open standards:

• SMTP, IMAP, POP3: Open protocols anyone can implement
• No single company controls email (unlike messaging apps)
• This interoperability is email's greatest strength and greatest weakness
• Email is the last open communication protocol on the internet

The Dark Side

• Spam: 96% of all email is spam; costs businesses $20+ billion annually
• Phishing: Email is the #1 attack vector for cybercrime
• Productivity drain: Average worker spends 2.5 hours/day on email
• Information overload: Inbox anxiety, email fatigue, burnout
• Security: Email is inherently insecure (SMTP has no encryption by default)
• CC culture: Information overload from unnecessary CCs and reply-alls

Fun Facts

• The @ symbol was chosen because it appeared on every keyboard and wasn't used in names
• Queen Elizabeth II sent her first email in 1976
• The first email from space was sent in 1991 (STS-43 Atlantis crew)
• Spam (the canned meat) gave its name to unwanted email (Monty Python sketch)
• The average office worker receives 100+ emails/day but only responds to 12%
• Email is older than the World Wide Web (1971 vs 1989)

The Takeaway

In 1971, Ray Tomlinson sent a forgettable test message between two computers sitting next to each other and accidentally created the most important communication tool since the telephone. Email is now the backbone of business, the universal digital identity, and the last open communication protocol on the internet. It's also 96% spam, a major security vulnerability, and the reason you spend 2.5 hours a day on something that didn't exist 55 years ago. Tomlinson never patented email, never profited from it, and famously said: "I don't think it's important at all." One of the most consequential inventions in history, created by a man who thought it wasn't a big deal.