From letters from mail.ru, you can determine the sender's IP, but this will not work with Yandex and Gmail. What prevents mail.ru from doing the same?

Question

gmail

Letters from Yandex and Gmail also have an IP, but this is not the real IP of the sender.

Answer 1

If a soapbox inserts the IP of a web client into a letter - this is a puncture of the soapbox, you can’t do this :) Because this is a violation of privacy. The real ip of the client can only be if the client sent the letter by the mail client from his computer (then the mail server legally fixes the ip from which the letter was received).

Answer 2

With the current flow of fresh viruses, this is not a puncture, but heavenly mana from mail.ru.
The search for young and not very virus writers comes down to the banal: I came, I saw, I planted.

Answer 3

google sends everything is readable, Yandex sends 127.0.01) exactly who does not send protonmail
https://2ip.ru/know-email-ip/ you can check here send and see info read from the body of the letter