[Freedombox-discuss] gpg-mailgate is a gateway for Postfix that uses the GNU Privacy Guard application to encrypt e-mails before being sent to the next hop.

[Eugen Leitl]

https://code.google.com/p/gpg-mailgate/

gpg-mailgate is a gateway for Postfix that uses the GNU Privacy Guard application to encrypt e-mails before being sent to the next hop.
INSTALLATION:

    Ensure that GPG is installed and configured.
        Make sure public keys for all of your potential recipients are available in the GPG home directory you use in step 2 
    Configure /etc/gpg-mailgate.conf based on the provided sample config
    Place gpg-mailgate.py in /usr/local/bin/
    Place the GnuPG directory in /usr/local/lib/python2.5/site-packages
    Add the following to the end of /etc/postfix/master.cf

    gpg-mailgate    unix    -       n       n       -       -       pipe
            flags= user=nobody argv=/usr/local/bin/gpg-mailgate.py

    127.0.0.1:10028 inet    n       -       n       -       10      smtpd
            -o content_filter=
            -o receive_override_options=no_unknown_recipient_checks,no_header_body_checks
            -o smtpd_helo_restrictions=
            -o smtpd_client_restrictions=
            -o smtpd_sender_restrictions=
            -o smtpd_recipient_restrictions=permit_mynetworks,reject
            -o mynetworks=127.0.0.0/8
            -o smtpd_authorized_xforward_hosts=127.0.0.0/8

    Add the following to /etc/postfix/main.cf

    content_filter = gpg-mailgate

    Restart postfix.