commonmx.com has no MX records.
Question and response
Question
dig commonmx.com. MX
Answer
The response has no answer records.
Authority
commonmx.com. 3600 SOA ns-usa.topdns.com. hostmaster.topdns.com. 2026020301 43200 900 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0