Hi,
this works:
dig extraabi.de MX
; <<>> DiG 9.11.3-1ubuntu1.18-Ubuntu <<>> extraabi.de MX
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10439
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS...