mx3c50.megamailservers.eu has no MX records.
Question and response
Question
dig mx3c50.megamailservers.eu. MX
Answer
The response has no answer records.
Authority
megamailservers.eu. 450 SOA ns1.meganameservers.eu. admin.meganameservers.eu. 234 3600 300 3600000 43200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0