syntr.es.		30 IN SOA dns1.sered.net. root.cpseo12.eu. (
				2020120200 ; serial
				3600       ; refresh (1 hour)
				1800       ; retry (30 minutes)
				1209600    ; expire (2 weeks)
				86400      ; minimum (1 day)
				)

syntr.es.		30 IN TXT "v=spf1 +a +mx +ip4:51.91.12.89
include:_spf.gestiondeservidor.net -all"

syntr.es.		30 IN A	149.202.7.131

Mail exchangers:
syntr.es.		30 IN MX 0 syntr.es.

Name servers:
syntr.es.		30 IN NS dns2.sered.net.
syntr.es.		30 IN NS dns1.sered.net.