smtp.bdc.lt has no CNAME records.
Question and response
Question
dig smtp.bdc.lt. NS
Answer
The response has no answer records.
Authority
bdc.lt. 600 SOA ns1.telecom.lt. hostmaster.telecom.lt. 2025100601 7200 3600 800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0