firmtop.ru.		30 IN SOA xanet.ru. root.xanet.ru. (
				2018091711 ; serial
				3600       ; refresh (1 hour)
				3600       ; retry (1 hour)
				604800     ; expire (1 week)
				86400      ; minimum (1 day)
				)

firmtop.ru.		30 IN TXT "v=spf1 ip4:136.243.176.33 a mx ~all"

firmtop.ru.		30 IN A	136.243.176.33

Mail exchangers:
firmtop.ru.		30 IN MX 10 mail.firmtop.ru.

Name servers:
firmtop.ru.		30 IN NS ns1.xanet.ru.
firmtop.ru.		30 IN NS ns2.xanet.ru.