Question and response
Question
dig smtp.GBLNET.RU. NS
Answer
smtp.GBLNET.RU. 5 CNAME mx.GBLNET.RU.
Authority
GBLNET.RU. 8595 SOA ns.GBLNET.RU. vvv.GBLNET.RU. 2026021901 10800 1200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0