Question and response
Question
dig emailmkt.fbnet.com.br. NS
Answer
emailmkt.fbnet.com.br. 5 CNAME u22591655.wl156.sendgrid.net.
Authority
wl156.sendgrid.net. 1800 SOA aisha.ns.cloudflare.com. dns.cloudflare.com. 2398061652 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0