39 lines
1.5 KiB
Plaintext
39 lines
1.5 KiB
Plaintext
1) Ensure that GPG is installed and configured.
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a) Make sure public keys for all of your potential recipients are
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available in the GPG home directory you use in step 2
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2) Configure /etc/gpg-mailgate.conf based on the provided sample config
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3) Place gpg-mailgate.py in /usr/local/bin/
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4) Place the GnuPG directory in /usr/lib/python2.7/ (replace 2.7 with your Python version)
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5) Add the following to the end of /etc/postfix/master.cf
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gpg-mailgate unix - n n - - pipe
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flags= user=nobody argv=/usr/local/bin/gpg-mailgate.py ${recipient}
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127.0.0.1:10028 inet n - n - 10 smtpd
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-o content_filter=
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-o receive_override_options=no_unknown_recipient_checks,no_header_body_checks
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-o smtpd_helo_restrictions=
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-o smtpd_client_restrictions=
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-o smtpd_sender_restrictions=
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-o smtpd_recipient_restrictions=permit_mynetworks,reject
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-o mynetworks=127.0.0.0/8
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-o smtpd_authorized_xforward_hosts=127.0.0.0/8
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6) Add the following to /etc/postfix/main.cf
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content_filter = gpg-mailgate
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7) Restart postfix.
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Note 1: it is also possible to create a dedicated user to store the PGP public keys
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1) useradd -s /bin/false -d /var/gpg -M gpgmap
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2) mkdir -p /var/gpg/.gnupg
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3) chown -R gpgmap /var/gpg
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4) chmod 700 /var/gpg/.gnupg
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5) sudo -u gpgmap /usr/bin/gpg --import /home/youruser/public.key --homedir=/var/gpg/.gnupg
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a) replace the path with the location of your public key
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b) the path can be deleted after importation
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6) Confirm that it's working: sudo -u gpgmap /usr/bin/gpg --list-keys --homedir=/var/gpg/.gnupg
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7) Use keyhome = /var/gpg/.gnupg in gpg-mailgate.conf
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