whmcs-accept.oxilion.nl has no MX records.
Question and response
Question
dig whmcs-accept.oxilion.nl. MX
Answer
The response has no answer records.
Authority
oxilion.nl. 600 SOA ns1.oxilion.nl. postmaster.oxilion.nl. 2025120107 14400 3600 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0