The first email was sent by Ray Tomlinson, a computer programmer, to himself as a test message. He used the @ symbol to separate the user's name from the host computer's name.
This innovation paved the way for modern email systems and revolutionized the way people communicate. Tomlinson's invention has had a lasting impact on the way we connect with each other online. His simple yet groundbreaking idea has become an essential part of our digital lives.