Question and response
Question
dig mail.gtek.biz. NS
Answer
mail.gtek.biz. 5 CNAME webmail.emailsrvr.com.
Authority
emailsrvr.com. 600 SOA pdns219.ultradns.com. postmaster.emailsrvr.com. 2016053250 3600 600 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0