4osclass.net.		30 IN SOA dns1.yandex.net. dns-hosting.yandex.ru. (
				21         ; serial
				900        ; refresh (15 minutes)
				90         ; retry (1 minute 30 seconds)
				86400      ; expire (1 day)
				900        ; minimum (15 minutes)
				)

4osclass.net.		30 IN TXT "v=spf1 +a +mx +a:831629-cc31619.tmweb.ru 
redirect=_spf.yandex.net  -all"

4osclass.net.		30 IN A	91.210.169.120

Mail exchangers:
4osclass.net.		30 IN MX 10 mail.4osclass.net.
4osclass.net.		30 IN MX 20 mx.yandex.net.

Name servers:
4osclass.net.		30 IN NS dns2.yandex.net.
4osclass.net.		30 IN NS dns1.yandex.net.