Is there a universal way to unsubscribe from mailing letters, in the same mail.ru?

Question

Python

Is it possible to unsubscribe from mailing emails in one way, or is it necessary to parse letters for the presence of any (Unsubscribe, Unsubscribe, Unsubscribe) with further processing?

Answer 1

Of course not. Do you think you can unsubscribe from any mailing list?

Answer 2

Surprisingly, a letter with the heading List-Unsubscribe mail.ru immediately moves to spam.
And without it in the Inbox!