ns3.hostmar.com has no MX records.
Question and response
Question
dig ns3.hostmar.com. MX
Answer
The response has no answer records.
Authority
hostmar.com. 14400 SOA ns1.hostmar.com. root.hostmar.com. 2025032601 28800 7200 2000000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0