conten.ru.		30 IN SOA firstvds.ru. root.example.com. (
				2020053100 ; serial
				10800      ; refresh (3 hours)
				3600       ; retry (1 hour)
				604800     ; expire (1 week)
				86400      ; minimum (1 day)
				)

conten.ru.		30 IN TXT "v=spf1 ip4:37.46.131.79 a mx ~all"

conten.ru.		30 IN A	37.46.131.79

Mail exchangers:
conten.ru.		30 IN MX 20 mail.conten.ru.
conten.ru.		30 IN MX 10 mail.conten.ru.

Name servers:
conten.ru.		30 IN NS ns2.example.com.
conten.ru.		30 IN NS ns1.example.com.