ket-rt.ru.		30 IN SOA s4.radisol.ru. support.radisol.ru. (
				2021030756 ; serial
				3600       ; refresh (1 hour)
				3600       ; retry (1 hour)
				604800     ; expire (1 week)
				86400      ; minimum (1 day)
				)

ket-rt.ru.		30 IN TXT "v=spf1 ip4:185.137.235.140 ip4:185.137.235.140 a mx ~all"

ket-rt.ru.		30 IN A	178.249.70.75

Mail exchangers:
ket-rt.ru.		30 IN MX 20 mail.ket-rt.ru.
ket-rt.ru.		30 IN MX 10 mail.ket-rt.ru.

Name servers:
ket-rt.ru.		30 IN NS ns2.radisol.ru.
ket-rt.ru.		30 IN NS ns1.radisol.ru.