www2.webcas.net has no MX records.
Question and response
Question
dig www2.webcas.net. MX
Answer
The response has no answer records.
Authority
webcas.net. 3600 SOA dns.webcas.net. nfujita.azia.co.jp. 2026021701 3600 1800 86400 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0