Get Email Origin
This Tinyscript-based allows to load an email and to parse the receivers, indicating where the found IP addesses originate from.
This can be installed using:
$ pip install ipaddress mail_parser maxminddb-geolite2 tinyscript
$ wget https://gist.githubusercontent.com/dhondta/9a8027062ff770b2aa5d8422ddd78b57/raw/get-email-origin.py && chmod +x get-email-origin.py && sudo mv get-email-origin.py /usr/bin/get-email-origin