As a new Emacs user, I decided to start using Gnus. I achieved to configure it, but I didn't manage to send mail properly. Indeed, when I use either
C-c C-c or
M-x message-send-and-exit, it loads KMail (my default mail reader on Fedora 23 KDE) fulfilled with my mail specificities. Is there a way so I could send mail from Emacs itself?
I fixed it using another emacs configuration on github (https://github.com/eschulte/emacs24-starter-kit/). I guess it's too soon for me to make my own configuration :)