c21.es.			30 IN SOA ns1.dondominio.com. dnsadmin.dondominio.com. (
				2024030500 ; serial
				10800      ; refresh (3 hours)
				1800       ; retry (30 minutes)
				691200     ; expire (1 week 1 day)
				3600       ; minimum (1 hour)
				)

c21.es.			30 IN TXT "v=spf1 include:spf.dondominio.com"

c21.es.			30 IN A	31.214.178.63

Mail exchangers:
c21.es.			30 IN MX 10 mx01.dondominio.com.

Name servers:
c21.es.			30 IN NS ns2.dondominio.com.
c21.es.			30 IN NS ns1.dondominio.com.