Head to Thunderbird
home page and download and install Thunderbird. Then go to
the GnuPG site and download and install
GPG. Then go to Enigmail
home site, download and install Enigmail. Then generate a key pair.
Then get all your friends to do these things. Then all of you
send your PUBLIC key to each other, via any channel you choose, and
verify that the keys have not been tampered with. (Read off some randomly
located characters from each other public key over the phone and check
that they are the same is one way to do it.) Then import these keys into
Then all of you have a safer way to email.