cmilter

A mail milter to prevent e-mails from countries from which you don't wish to receive e-mails.

Before installing:

• modify the blacklist hash table in the source code

• install dependencies

    apt-get install libgeoip-dev
  

  or yum install perl-IPC-System-Simple perl-autodie perl-Data-Validate-IP yum install perl-Geo-IP perl-Net-Whois-IP perl-CHI

• choose your caching algorithm (look for $cache = in the source code)

• Install Sendmail::PMilter from CPAN, the other needed modules will be installed automatically

To install, simply put this script into /usr/local/etc/cmilter

Put this into /etc/mail/sendmail.mc:

INPUT_MAIL_FILTER(`cmilter', `S=local:/var/run/cmilter, F=T, T=S:4m;R:4m')dnl

And run

service sendmail restart

If you are using systemd, copy and paste this content into /etc/systemd/system/cmilter.service

[Unit]
Description=Block e-mail by country
After=network.target

[Service]
ExecStart=/usr/local/etc/cmilter local:/var/run/cmilter
KillMode=process
Restart=on-failure

[Install]
WantedBy=multi-user.target

Then run

systemctl daemon-reload
systemctl enable cmilter.service
systemctl start cmilter.service

If you are not using systemd, put these into /etc/rc.local:

rm -f /var/run/cmilter
/usr/local/etc/cmilter local:/var/run/cmilter