185-3-40-0-static.kasserver.com has no MX records.
Question and response
Question
dig 185-3-40-0-static.kasserver.com. MX
Answer
The response has no answer records.
Authority
kasserver.com. 7200 SOA ns5.kasserver.com. hostmaster.kasserver.com. 2602270440 28800 7200 1209600 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0