ns7.ecomsiam.com has no MX records.
Question and response
Question
dig ns7.ecomsiam.com. MX
Answer
The response has no answer records.
Authority
ecomsiam.com. 86400 SOA ns17.ecomsiam.com. udomjit.ecomsiam.com. 2026021701 3600 7200 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0