224.sms.at has no MX records.
Question and response
Question
dig 224.sms.at. MX
Answer
The response has no answer records.
Authority
sms.at. 600 SOA ns1.easyname.eu. hostmaster.easyname.eu. 2025072801 10800 3600 604800 600
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0