Is it enough for the Yandex mailer so that the letter does not fall into spam, the ability to unsubscribe from the mailing list, the letter?

Question

Email

We set up sending email notifications on the site! tell me how to do it right?
Now in the letters there is no way to unsubscribe from the notification, for example.
No registration confirmation. Basically, we don't need it.
Is it enough for the mailer to have the ability to unsubscribe? or do i need to do something else?
here are the requirements - https://yandex.ru/support/mail/spam/honest-mailers.xml

Answer 1

No, not enough.
Not suitable for mass mailings.
For single letters (for example, to confirm registration on the site) - it will do.