SOA
Start of Authority
Primary NS
Mailbox
hostmaster.systemdns.com
Serial
1710907723
Refresh
604800
Retry
86400
Expire
300
Minimum TTL
60
NS
Nameservers
MX
Mail Exchangers
TXT
TXT Records
v=spf1 include:_spf.protonmail.ch ~all
protonmail-verification=1f5c701df6269ab244a8270290211d2d61f1409d
A