stroi-prorab.ru.	30 IN SOA server.domain.com. root.server.domain.com. (
				2018071700 ; serial
				10800      ; refresh (3 hours)
				3600       ; retry (1 hour)
				604800     ; expire (1 week)
				86400      ; minimum (1 day)
				)

stroi-prorab.ru.	30 IN TXT "v=spf1 ip4:5.61.40.203 a mx ~all"

stroi-prorab.ru.	30 IN A	5.61.40.203

Mail exchangers:
stroi-prorab.ru.	30 IN MX 20 mail.stroi-prorab.ru.
stroi-prorab.ru.	30 IN MX 10 mail.stroi-prorab.ru.

Name servers:
stroi-prorab.ru.	30 IN NS ns1.7saw.ru.
stroi-prorab.ru.	30 IN NS ns2.7saw.ru.