DNS/乗取/対策について、ここに記述してください。

1. レジストラ

https://fastmail.blog/2014/04/10/when-two-factor-authentication-is-not-enough/

When two-factor authentication is not enough

2. browser

https://www.cloudflare.com/learning/ssl/what-is-domain-spoofing/

Bookmark important websites.

Keep an in-browser bookmark of each legitimate website. Clicking on the bookmark, instead of following a link or typing the URL, ensures the correct URL loads each time. For instance, instead of typing "mybank.com" or performing a Google search for the bank's website, create a bookmark for the website.