providerbox.net has no MX records.
Question and response
Question
dig providerbox.net. MX
Answer
The response has no answer records.
Authority
providerbox.net. 86400 SOA ns.providerbox.de. info\@providerbox.net. 1253641491 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0