atoracle.com has no MX records.
Question and response
Question
dig atoracle.com. MX
Answer
The response has no answer records.
Authority
atoracle.com. 900 SOA ns1.p201.dns.oraclecloud.net. hostmaster.oracle.com. 2025111302 10800 3600 604800 900
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0