To connect the Yandex.Mail mail collector to mailbox do the following:
In the main Yandex.Mail window, click on the button with the gear and select “
Collecting mail from other mailboxes»:

Fill out the form and click "
Include collector»:

If necessary, specify additional settings and click "
Save changes"(You will need to re-enter the name and password of the mailbox):

Check the mail collector is working. The collector connects to the box about once every 20 minutes.