The web was not yet around, Tim Berners-Lee was working on it at CERN in Geneva, when the very first e-mail was sent from Space on 28 August 1991 by two of the crew on a nine-day space mission.

Earth was the "addressee" of the electronic message for lack of a better address. The message was written on a Mac Portable by James Adamson and Shannon Lucid, two astronauts on the ninth mission of the Atlantis spacecraft. The computer weighed 7,2 kilograms, had 1 megabyte of RAM, and cost 7300 US dollars, which is the equivalent of 13 thousand dollars at today's value.

The message said, "Hello Earth! Greetings from the STS-43 Crew. This is the first AppleLink from space. Having a great time, wish you were here, [...] Hasta la vista, baby,...we'll be back!"

The message was sent to the Johnson Space Center in Houston (Texas), and AppleLink was an online service provided by Apple at the time. "Hasta la vista, baby," became cultic having been said by Arnold Schwarzenegger in Terminator 2.

In addition to the e-mail, a video recording has also survived in which the astronauts demonstrate how a floppy disk is "ejected" by the computer (www.youtube.com/watch?v=vMNw99Q8Ok0(link is external)).

Source: www.entrepreneur.com/article/271866(link is external) and www.theatlantic.com/notes/2016/03/ejecting-a-floppy-diskin-space/472038