Question and response
Question
dig pop3.ETELECOM.RU. NS
Answer
pop3.ETELECOM.RU. 5 CNAME mx.ETELECOM.RU.
mx.ETELECOM.RU. 5 CNAME mx.gblnet.RU.
Authority
gblnet.ru. 8966 SOA ns.gblnet.ru. vvv.gblnet.ru. 2026022601 10800 1200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0