mail2.memset.com has no CNAME records.
Question and response
Question
dig mail2.memset.com. NS
Answer
The response has no answer records.
Authority
memset.com. 753 SOA ns1.memset.com. hostmaster.memset.com. 1771770616 16384 2048 1048576 2560
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0