mail.ek-hosting.net has no MX records.
Question and response
Question
dig mail.ek-hosting.net. MX
Answer
The response has no answer records.
Authority
ek-hosting.net. 3600 SOA ns1.ek-hosting.net. hostmaster.ek-hosting.net. 2026021200 3600 3600 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0