mxwww.amris.com has no CNAME records.
Question and response
Question
dig mxwww.amris.com. NS
Answer
The response has no answer records.
Authority
amris.com. 1485 SOA asa.ns.cloudflare.com. dns.cloudflare.com. 2397057898 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0