mx1.facct.email has no CNAME records.
Question and response
Question
dig mx1.facct.email. NS
Answer
The response has no answer records.
Authority
facct.email. 60 SOA a.ns.selectel.ru. support.selectel.ru. 2025101601 10800 3600 604800 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0