fallbackmx.qfilter.eu has no CNAME records.
Question and response
Question
dig fallbackmx.qfilter.eu. NS
Answer
The response has no answer records.
Authority
qfilter.eu. 3600 SOA ns1.qweb.net. hostmaster.qweb.nl. 2026011900 3600 3600 604800 14400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0