This executable can run non-interactive system commands.
This function can be performed by any unprivileged user.
echo -e ':0\n| /path/to/command >/path/to/temp-file
procmail -m /path/to/temp-file
This function is performed by the privileged user if executed via sudo because the acquired privileges are not dropped.
echo -e ':0\n| /path/to/command >/path/to/temp-file
procmail -m /path/to/temp-file