Keith’s note: According to the official @NASA Twitter: “@Armo15 Astronauts’ e-mail addresses aren’t public, but you can send mail to them. Mailing address at: http://go.nasa.gov/dUQDby“
Once upon a time you could go to people.nasa.gov and find the email addresses of all NASA civil servants. Now, it would seem, some of these civil servants are suddenly not as accessible to the public as are others. No reason given. Alas, they have not totally purged their database of all astronauts …

Biologist, Explorers Club Fellow, ex-NASA Space Biologist and Payload integrator, Editor of NASAWatch.com and Astrobiology.com, Lapsed climber, Explorer, Synaesthete, Former Challenger Center board member...