Question and response
Question
dig Mx.etelecom.ru. NS
Answer
Mx.etelecom.ru. 5 CNAME mx.gblnet.ru.
Authority
GBlNeT.ru. 14 SOA ns.GBlNeT.ru. vvv.GBlNeT.ru. 2026030201 10800 1200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0