mxscan.saix.net has no TXT records.
Question and response
Question
dig mxscan.saix.net. TXT
Answer
The response has no answer records.
Authority
saix.net. 3304 SOA igubu.saix.net. dnsadmin.saix.net. 2026013919 10800 3600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0