spf.mlwrx.com has no CNAME records.
Question and response
Question
dig spf.mlwrx.com. NS
Answer
The response has no answer records.
Authority
mlwrx.com. 4299 SOA a.ns14.net. domain-admin.eworx.at. 2026010925 43200 14400 604800 43200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0