Enigmail tutorial

"How to secure your emails with GnuPG and Enigmail",
http://dudu.dyn.2-h.org/nist/gpg-enigmail-howto.php

mirror: http://people.via.ecp.fr/~clem/nist/gpg-enigmail-howto.php

I have tried to make it at the same time concise, novice-friendly,
and open to enough extern sources to let the reader go further;
please *tell me* if you have remarks or improvement suggestions!

Cheers,
- --
clem

PS: I can't deny LeRoy D. Cressy Enigmail beginners manual
(http://downloads.mozdev.org/enigmail/docs/beginners-manual.pdf or
http://lrcressy.com/linux/li-index.html for the latest version) is
quite good, but it's a big PDF which might not suit all readers.