SOA
Start of Authority
Primary NS
Mailbox
admin.secure-by-design.com
Serial
2023061501
Refresh
10800
Retry
1800
Expire
604800
Minimum TTL
86400
NS
Nameservers
TXT
TXT Records
v=spf1 mx a a:mail.secure-by-design.com a:mail.netidea.com include:imap-spf.sbd.im ~all
A