ns3.iqvia.com has no MX records.
Question and response
Question
dig ns3.iqvia.com. MX
Answer
The response has no answer records.
Authority
iqvia.com. 3600 SOA ns1.iqvia.com. hostmaster.iqvia.com. 2026022511 28800 1800 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0