xn--9dbq2a has no MX records.
Question and response
Question
dig xn--9dbq2a. MX
Answer
The response has no answer records.
Authority
xn--9dbq2a. 86400 SOA ac1.nstld.com. info.verisign-grs.com. 1772944228 1800 900 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0