ipolk.ru.		30 IN SOA dns1.yandex.net. dns-hosting.yandex.ru. (
				9          ; serial
				900        ; refresh (15 minutes)
				90         ; retry (1 minute 30 seconds)
				86400      ; expire (1 day)
				900        ; minimum (15 minutes)
				)

ipolk.ru.		30 IN TXT "v=spf1 ip4:37.143.15.192 include:_spf.yandex.net +a +mx
~all"
ipolk.ru.		30 IN TXT "v=spf1 redirect=_spf.yandex.net"

Mail exchangers:
ipolk.ru.		30 IN MX 10 mx.yandex.net.

Name servers:
ipolk.ru.		30 IN NS dns1.yandex.net.
ipolk.ru.		30 IN NS dns2.yandex.net.