virginm.net has no MX records.
Question and response
Question
dig virginm.net. MX
Answer
The response has no answer records.
Authority
virginm.net. 1800 SOA ns1.virginmedia.net. hostmaster.virginmedia.net. 2010092756 86400 7200 1209600 1800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0