Question and response
Question
dig spf.frontbridge.com. TXT
Answer
spf.frontbridge.com. 3600 TXT "v=spf1 ptr:protection.outlook.com ptr:messaging.microsoft.com ptr:o365filtering.com -all"
Authority
frontbridge.com. 3600 NS ns1-gtm.glbdns.o365filtering.com.
frontbridge.com. 3600 NS ns2-gtm.glbdns.o365filtering.com.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0