SOA
Start of Authority
Primary NS
Mailbox
hostmaster.topdns.com
Serial
2023032000
Refresh
14400
Retry
7200
Expire
950400
Minimum TTL
7200
TXT
TXT Records
v=spf1 include:_spf.protonmail.ch mx ~all
protonmail-verification=b9e19b66b05bd3fa951404228b7e1fa7ed9cd50e