mxforward.world-direct.at has no CNAME records.
Question and response
Question
dig mxforward.world-direct.at. NS
Answer
The response has no answer records.
Authority
world-direct.at. 257 SOA polly1rz.world-direct.at. administrator.world-direct.at. 2019118565 10800 1350 1209600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0