mail.membrama.com has no CNAME records.
Question and response
Question
dig mail.membrama.com. NS
Answer
The response has no answer records.
Authority
membrama.com. 300 SOA ns11.rehost.com.ua. hostmaster.redo.com.ua. 2026013001 10000 2400 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0