SOA
Start of Authority
Primary NS
Mailbox
cloud-dns-hostmaster.google.com
Serial
7
Refresh
21600
Retry
3600
Expire
259200
Minimum TTL
300
TXT
TXT Records
protonmail-verification=1b4262bd69c2cf0a4be132c5e150df624f44826d
v=spf1 include:_spf.protonmail.ch ~all