mx2.epay.ingenico.com has no CNAME records.
Question and response
Question
dig mx2.epay.ingenico.com. NS
Answer
The response has no answer records.
Authority
epay.ingenico.com. 60 SOA dns1.p07.nsone.net. hostmaster.nsone.net. 1655303026 7200 1800 2419200 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0