mail01.megamail.nl has no MX records.
Question and response
Question
dig mail01.megamail.nl. MX
Answer
The response has no answer records.
Authority
megamail.nl. 900 SOA ns1.hix.nl. postmaster.megamail.nl. 2013021200 10800 3600 604800 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0