SOA
Start of Authority
Primary NS
Mailbox
tech.key-systems.net
Serial
2026090900
Refresh
10800
Retry
3600
Expire
604800
Minimum TTL
28800
TXT
TXT Records
protonmail-verification=512cbdf464bfe1b6aff99f5c5132bfe00b856981
v=spf1 include:_spf.protonmail.ch mx ~all