46 lines
1.8 KiB
Markdown
46 lines
1.8 KiB
Markdown
1. Ensure that GPG is installed and configured. Also make sure public keys for
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all of your potential recipients are available in the GPG home directory
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used for `keyhome` in step 2.
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2. Configure `/etc/gpg-mailgate.conf` based on the provided
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`gpg-mailgate.conf.sample`
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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
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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
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It is possible to create a dedicated user to store the PGP public keys with
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these example commands:
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useradd -s /bin/false -d /var/gpg -M gpgmap
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mkdir -p /var/gpg/.gnupg
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chown -R gpgmap /var/gpg
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chmod 700 /var/gpg/.gnupg
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sudo -u gpgmap /usr/bin/gpg --import /home/youruser/public.key --homedir=/var/gpg/.gnupg
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- Replace `/home/youruser/public.key` with the location of your public key
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- `/home/youruser/public.key` can be deleted after importation
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- Confirm that it's working: `sudo -u gpgmap /usr/bin/gpg --list-keys --homedir=/var/gpg/.gnupg`
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- Use `keyhome = /var/gpg/.gnupg` in `gpg-mailgate.conf`
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