Question and response
Question
dig smtpapi._domainkey.syncedtool.com. NS
Answer
smtpapi._domainkey.syncedtool.com. 5 CNAME smtpapi._domainkey.sendgrid.net.
Authority
sendgrid.net. 135 SOA ns10.dnsmadeeasy.com. dns.dnsmadeeasy.com. 2011294061 14400 600 1728000 180
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0