ns3.dnspackage.com has no MX records.
Question and response
Question
dig ns3.dnspackage.com. MX
Answer
The response has no answer records.
Authority
dnspackage.com. 3600 SOA names1.ds.network. dns.ds.network. 2026011108 7200 120 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0