Why don't @media requests work in Yandex?

Question

Yandex

Hello! I am making the layout of the letter adaptive and noticed that Yandex does not accept media requests for the adaptive and still deletes the classes. Tell me what to do in this case???

<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">

viewport put this

Answer 1

Be simple. Postal workers cut a lot. Minimize styles and use only inline styles, or better layout with tables.
It is not known in advance in which mail client the recipient will view the letter (Outlook in the office, mobile client). There may also be redirection to another mailbox in another service.
Here is a good article on Habré on this topic. See the section on layout.