smtp.blix.com has no MX records.
Question and response
Question
dig smtp.blix.com. MX
Answer
The response has no answer records.
Authority
blix.com. 60 SOA ns1.blix.com. blix.com. 2026022407 28800 7200 604800 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0