mta60.opusinteractive.io has no MX records.
Question and response
Question
dig mta60.opusinteractive.io. MX
Answer
The response has no answer records.
Authority
opusinteractive.io. 300 SOA ns1.opusinteractive.io. sysadmin.opusinteractive.com. 2026021001 3600 600 1209600 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0