kcweb1.kcc.knowledgewing.com has no MX records.
Question and response
Question
dig kcweb1.kcc.knowledgewing.com. MX
Answer
The response has no answer records.
Authority
knowledgewing.com. 900 SOA ns000.d-53.net. dns-managers.iij.ad.jp. 370 3600 600 604800 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0