mail2.myactv.net has no CNAME records.
Question and response
Question
dig mail2.myactv.net. NS
Answer
The response has no answer records.
Authority
myactv.net. 600 SOA ns1.myactv.net. root.ns1.myactv.net. 2025091501 3600 600 1209600 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0