syntaxbiz.com has no MX records.
Question and response
Question
dig syntaxbiz.com. MX
Answer
The response has no answer records.
Authority
syntaxbiz.com. 3600 SOA ns1.siteground.net. admins.siteground.com. 35 10800 3600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0