server-g.kluwermedia.be has no MX records.
Question and response
Question
dig server-g.kluwermedia.be. MX
Answer
The response has no answer records.
Authority
kluwermedia.be. 86400 SOA ns1.ebrand.be. hostmaster.eurodns.com. 2020102904 43200 7200 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0