mx1.eng.ntta.com has no MX records.
Question and response
Question
dig mx1.eng.ntta.com. MX
Answer
The response has no answer records.
Authority
eng.ntta.com. 3 SOA ns1-06.azure-dns.com. dnsadmin.eng.ntta.com. 2024043001 1 1 1 3
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0