SOA
Start of Authority
Primary NS
Mailbox
director.opcion3.net
Serial
2025010302
Refresh
1800
Retry
900
Expire
604800
Minimum TTL
600
NS
Nameservers
MX
Mail Exchangers
TXT
TXT Records
v=spf1 +a +mx include:opcion3.net +include:contabo.net +include:mail-relay.contabo.net ~all