ns.totaalnet.com has no MX records.
Question and response
Question
dig ns.totaalnet.com. MX
Answer
The response has no answer records.
Authority
totaalnet.com. 3600 SOA ns.totaal.net. postmaster.totaalnet.nl. 2011022809 28800 7200 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0