mail.firstdata.lv has no CNAME records.
Question and response
Question
dig mail.firstdata.lv. NS
Answer
The response has no answer records.
Authority
firstdata.lv. 5179 SOA dns1.cscdns.net. hostmaster.cscdns.net. 2025082702 10800 3600 604800 14400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0