184.sipit.be has no MX records.
Question and response
Question
dig 184.sipit.be. MX
Answer
The response has no answer records.
Authority
sipit.be. 300 SOA dns0.zoneedit.com. zone.zoneedit.com. 1751003012 43200 10800 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0