pranspub03.phys.prod has no MX records.
Question and response
Question
dig pranspub03.phys.prod. MX
Answer
The response has no answer records.
Authority
prod. 900 SOA ns-tld1.charlestonroadregistry.com. cloud-dns-hostmaster.google.com. 1 21600 3600 259200 900
Additional
. 0 OPT ; payload 512, xrcode 0, version 0, flags 0