smtp.digi-net.ro has no CNAME records.
Question and response
Question
dig smtp.digi-net.ro. NS
Answer
The response has no answer records.
Authority
digi-net.ro. 8820 SOA ns1.rdsnet.ro. dns-adm.rdsnet.ro. 2026020553 10800 3600 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0