mail.colordns.eu has no MX records.
Question and response
Question
dig mail.colordns.eu. MX
Answer
The response has no answer records.
Authority
colordns.eu. 86400 SOA odin.dnscloud.zone. hostmaster.dnscloud.zone. 2014022501 86400 28800 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0