mail1223.services.twing.com has no MX records.
Question and response
Question
dig mail1223.services.twing.com. MX
Answer
The response has no answer records.
Authority
twing.com. 3600 SOA NS41.DOMAINCONTROL.com. dns.jomax.net. 2023050900 28800 7200 604800 3600
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0