mxout2.austriacloud.at has no MX records.
Question and response
Question
dig mxout2.austriacloud.at. MX
Answer
The response has no answer records.
Authority
austriacloud.at. 3600 SOA dns5.a1.net. domainadmin.a1.net. 2017110800 86400 7200 3600000 172800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0