ns2.ais-idc.com has no MX records.
Question and response
Question
dig ns2.ais-idc.com. MX
Answer
The response has no answer records.
Authority
ais-idc.com. 300 SOA ns1.ais-idc.com. root.ais-idc.com. 2015045250 10800 3600 604800 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0