SOA
Start of Authority
Primary NS
Mailbox
administrator.dynu.com
Serial
20
Refresh
1800
Retry
300
Expire
86400
Minimum TTL
300
TXT
TXT Records
mailconf=https://autoconfig.dynu.com/mail/config-v1.1.xml
v=spf1 mx a:acadia-mx.dynu.com a:bryce-mx.dynu.com -all
v=spf1 a:goldberglabs.com ~all
AAAA