IMAP (Recommended)
Incoming mail server — imap.yandex.com
Connection security — SSL
Port — 993

Outgoing mail server — smtp.yandex.com
Connection security — SSL
Port — 465

POP3
Incoming mail server — pop.yandex.com
Connection security — SSL
Port — 995

Outgoing mail server — smtp.yandex.com
Connection security — SSL
Port — 465