SOA
Start of Authority
Primary NS
Mailbox
awsdns-hostmaster.amazon.com
Serial
1
Refresh
7200
Retry
900
Expire
1209600
Minimum TTL
86400
NS
Nameservers
MX
Mail Exchangers
TXT
TXT Records
_sipfederationtls _tcp 100 1 5061 sipfed.online.lync.com.
MS=ms28336800
_sip _tls 100 1 443 sipdir.online.lync.com
v=spf1 a mx ip4:173.231.55.170 ip4:64.140.170.163 include:spf.protection.outlook.com -all
A