sistems.ru.		30 IN SOA ns1.adman.com. support.adman.com. (
				1736621702 ; serial
				7200       ; refresh (2 hours)
				3600       ; retry (1 hour)
				2419199    ; expire (3 weeks 6 days 23 hours 59 minutes 59 seconds)
				3600       ; minimum (1 hour)
				)

sistems.ru.		30 IN TXT "v=spf1 ip4:172.17.0.1 ip4:185.135.83.159 a mx ~all"

sistems.ru.		30 IN A	185.173.94.221

Mail exchangers:
sistems.ru.		30 IN MX 0 mail.sistems.ru.

Name servers:
sistems.ru.		30 IN NS ns2.adman.com.
sistems.ru.		30 IN NS ns1.adman.com.