The contemporary communication age began when Ray Tomlinson sent the first email in 1971. Because it comprised only a sum of numbers and letters, it might be stated that the first email seemed more like a password than a message, yet we can all agree that its value was enormous. It was essential in developing email marketing as we know it today!
Source: https://www.xomop.com/2022/01/email-marketing-strategies-that-will-work-in-2022-and-beyond.html