Question and response
Question
dig mail.cdkmessaging.com. NS
Answer
mail.cdkmessaging.com. 5 CNAME u19967175.wl176.sendgrid.net.
Authority
wl176.sendgrid.net. 1800 SOA aisha.ns.cloudflare.com. dns.cloudflare.com. 2397345621 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0