mail.edis.global has no CNAME records.
Question and response
Question
dig mail.edis.global. NS
Answer
The response has no answer records.
Authority
edis.global. 1714 SOA ns1.edis.global. root.edis.at. 2019053221 10000 900 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0