Who knows a free anonymous mail server?

Question

Anonymity

The problem is this: when using Gmail, Google can transfer data to third parties, including the IP address from which you access the mail. I am looking for a mailbox whose server does not disclose information about the user.

Answer 1

https://protonmail.ch/

Answer 2

Free if you install a mail server on your computer
Example: https://habr.com/en/company/ruvds/blog/325356/