acoustic-adm.com has no MX records.
Question and response
Question
dig acoustic-adm.com. MX
Answer
The response has no answer records.
Authority
acoustic-adm.com. 60 SOA ns1.acoustic-adm.com. hostmaster.acoustic-adm.com. 1 7200 900 1209600 60
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0