smtp.domreg.lt has no CNAME records.
Question and response
Question
dig smtp.domreg.lt. NS
Answer
The response has no answer records.
Authority
domreg.lt. 60 SOA ns1.domreg.lt. tech.domreg.lt. 2026022757 10800 3600 1209600 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0