Although Yandex mail is the safe and smartest way to communicate, you may receive the Yandex mail error code 3, which will not allow you to send emails. You may receive the error when your registration of the domain has expired or due to invalid delegation settings. You may also receive the error if you are blocked by the registrar to access the domain.
Proceed with the steps given below to fix the Yandex mail error code 3 occurring on your device.