sa-scan.saix.net has no MX records.
Question and response
Question
dig sa-scan.saix.net. MX
Answer
The response has no answer records.
Authority
saix.net. 3600 SOA igubu.saix.net. dnsadmin.saix.net. 2026013909 10800 3600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0