ns2.dns.nic.stream has no MX records.
Question and response
Question
dig ns2.dns.nic.stream. MX
Answer
The response has no answer records.
Authority
nic.stream. 900 SOA ns1.dns.nic.stream. admin.tldns.godaddy. 1771947687 1800 300 604800 1800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0