das2a.support.iij.jp has no MX records.
Question and response
Question
dig das2a.support.iij.jp. MX
Answer
The response has no answer records.
Authority
support.iij.jp. 300 SOA ns000.d-53.net. dns-managers.iij.ad.jp. 381 3600 600 604800 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0