Alternative sender to pdd.yandex.ru via smtp?

Question

Yandex

Connected the domain to Yandex. We set up sending from the site via smtp using phpmailer.
Now the question arose of how to send mail from the site on behalf of an alternative mailbox, which is registered in the settings of pdd.yandex.ru itself.
Those. there is a site.ru domain connected to Yandex and mail info @site .ru. Inside Yandex, he has an additional account [email protected] configured. Everything is sent from the Yandex interface, but now how to make the same sending from an alternative name via smtp?