Incitate the user to check their Spam folder, waiting for the registration email

### Your use case

When registering a new account in any ELEMENT application, you must specify your e-mail. The problem is that the Yandex company mailboxes are dominated in Russia. And all letters with registration fall into spam (many users expect letters for registration, but they do not see it, and do not realize that they go to spam). For Yandex Mail - this is a 100% result of sending letters to spam.


Translation on EN | Third letter to the company (in an attempt to solve the issue)
_hank you for the information provided.
Apparently, the letters you were sending seemed suspicious to our Spam Defense system. Unfortunately, it is impossible on our part to do anything - the system works automatically.
Advise those who want to receive letters to use the "Do not spam" button - then the letters will arrive in the "Inbox"._

Solution. When registering in Element/Matrix. The user needs to withdraw information not only to check email **(but also objectively check the spam folder)**. Without this warning, all users that I recommended for Element migration could not register in it.

### Have you considered any alternatives?

_No response_

### Additional context

_No response_