mx0.everett.org has no CNAME records.
Question and response
Question
dig mx0.everett.org. NS
Answer
The response has no answer records.
Authority
everett.org. 3518 SOA ns1.everett.org. root.everett.org. 2023070201 86400 14400 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0