tsukuba.aics.ne.jp has no MX records.
Question and response
Question
dig tsukuba.aics.ne.jp. MX
Answer
The response has no answer records.
Authority
aics.ne.jp. 1800 SOA ns0.aics.ad.jp. hostmaster.aics.ad.jp. 2026030301 10800 3600 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0