ouille.whoisprivacy.com has no MX records.
Question and response
Question
dig ouille.whoisprivacy.com. MX
Answer
The response has no answer records.
Authority
whoisprivacy.com. 86400 SOA ns1.eurodns.com. hostmaster.eurodns.com. 2025080701 86400 7200 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0