Question and response
Question
dig ctct1._domainkey.groupflow.app. NS
Answer
ctct1._domainkey.groupflow.app. 5 CNAME 100._domainkey.dkim1.ccsend.com.
Authority
ccsend.com. 2557 SOA ns4.ccsend.com. hostmaster.ccsend.com. 1773833107 16384 2048 1048576 2560
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0