mxforward.world-direct.at has no MX records.
Question and response
Question
dig mxforward.world-direct.at. MX
Answer
The response has no answer records.
Authority
world-direct.at. 300 SOA polly1rz.world-direct.at. administrator.world-direct.at. 2019118577 10800 1350 1209600 300
Additional
. 0 OPT ; payload 4000, xrcode 0, version 0, flags 0