webmail.mefa.uz has no CNAME records.
Question and response
Question
dig webmail.mefa.uz. NS
Answer
The response has no answer records.
Authority
mefa.uz. 5261 SOA hosting.scinet.uz. Alexandr\.perfect.gmail.com. 1770920130 10800 3600 604800 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0