mail.spacys.de has no MX records.
Question and response
Question
dig mail.spacys.de. MX
Answer
The response has no answer records.
Authority
spacys.de. 3600 SOA ns.spacys.de. hostmaster.spacys.de. 2016031278 86400 10800 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0