This Milter rejects the email which has encrypted zip file.

If the MTA receives such email, this will respond 550 5.7.1 We do not accpet encrypted zip. on the DATA command to reject it.

yum install -y python3 gcc python3-devel sendmail-devel

apt-get install -y python3-pip libmilter-dev

pip install no-ppap-milter

This will listen on port 9201 by default.

no-ppap-milter

If you want to use another port,

no-ppap-milter --socket-name inet:1234

will listen on port 1234.

If you want to use UNIX domain socket, invoke like this.

no-ppap-milter --socket-name unix:/var/run/milter.sock