Question and response
Question
dig smtp.ETELECOM.RU. NS
Answer
smtp.ETELECOM.RU. 5 CNAME mx.ETELECOM.RU.
mx.ETELECOM.RU. 5 CNAME mx.gblnet.RU.
Authority
gblnet.RU. 7962 SOA ns.gblnet.RU. vvv.gblnet.RU. 2026022601 10800 1200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0