Why are emails not coming from Contact Form 7?

Question

HTML

Hello.
Plugin Contact Form 7 on Wordpress stopped working.
When sending, it shows a message about successful sending.
E-mail I use "yandex".
Emails are not coming.
Form settings screen1 screen2
so I insert the form on the site <?php echo do_shortcode('[contact-form-7 id="1022" title="Form on the main"]'); ?>
Tell me what could be wrong?

Answer 1

Found the answer to the question, this is the installation of an additional plugin Configure SMTP.
Each mailbox (mail.ru, yandex, google) has its own settings (you can google it without any problems).
I put this answer as a solution so that people can see that there is a solution to this issue, if someone has a simpler solution, I will make your answer a solution without any problems.