_spf.nameweb.biz has no MX records.
Question and response
Question
dig _spf.nameweb.biz. MX
Answer
The response has no answer records.
Authority
nameweb.biz. 901 SOA ns.nscluster.us. hostmaster.nscluster.us. 2026030501 7200 3600 1209600 901
Additional
. 0 OPT ; payload 1400, xrcode 0, version 0, flags 0