joker-forward.com has no MX records.
Question and response
Question
dig joker-forward.com. MX
Answer
The response has no answer records.
Authority
joker-forward.com. 300 SOA a.ns.nrw.net. hostmaster.joker.com. 2026011934 14400 3600 1209600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0