SOA
Start of Authority
Primary NS
Mailbox
admin.demo.p154.lon.krystal.io
Serial
2026101501
Refresh
3600
Retry
1800
Expire
1209600
Minimum TTL
86400
MX
Mail Exchangers
TXT
TXT Records
v=spf1 ip4:152.89.79.36 ip4:77.72.2.154 +a +mx include:relay.k.io ~all
A