dnsus2.imshealth.com has no MX records.
Question and response
Question
dig dnsus2.imshealth.com. MX
Answer
The response has no answer records.
Authority
imshealth.com. 3600 SOA ns1.iqvia.com. hostmaster.iqvia.com. 2026022000 43200 7200 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0