mx-vip.mem.interq.net has no MX records.
Question and response
Question
dig mx-vip.mem.interq.net. MX
Answer
The response has no answer records.
Authority
interq.net. 86400 SOA ns1.gmointernet.com. hostmaster.gmointernet.com. 2020011500 1800 900 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0