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Filewall smtpd

Install Service
sudo pip install git+
Set your apikey in /etc/filewall-smtpd.conf

Start service with
sudo service filewall-smtpd start
To start filewall-smtpd at boot time, use
systemctl enable filewall-smtpd.service
. Get the full source code at


What you need to do on Postfix side is to edit configuration according to the suggestions made in the Advanced Content Filtering above, but for your convenience, here is the quick version that could work for you too:
content_filter = scan:localhost:10025
receive_override_options = no_address_mappings
scan      unix  -       -       n       -       10      smtp
      -o smtp_send_xforward_command=yes
      -o disable_mime_output_conversion=yes

localhost:10026 inet  n       -       n       -       10      smtpd
      -o content_filter=
      -o receive_override_options=no_unknown_recipient_checks,no_header_body_checks,no_milters
      -o smtpd_authorized_xforward_hosts=

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