ns3.serverdata.net has no MX records.
Question and response
Question
dig ns3.serverdata.net. MX
Answer
The response has no answer records.
Authority
serverdata.net. 3601 SOA ns2.serverdata.net. hostmaster.serverdata.net. 2026022223 3600 1800 1814400 3601
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0