wal02smtp.authoria.com has no MX records.
Question and response
Question
dig wal02smtp.authoria.com. MX
Answer
The response has no answer records.
Authority
authoria.com. 600 SOA sec1.rcode0.net. dnsadmin.peoplefluent.com. 2025092650 3600 600 604800 600
Additional
. 0 OPT ; payload 1400, xrcode 0, version 0, flags 0