vanlan.integraonline.net has no MX records.
Question and response
Question
dig vanlan.integraonline.net. MX
Answer
The response has no answer records.
Authority
integraonline.net. 7200 SOA ns.integraonline.com. hostmaster.integraonline.com. 2009071601 2800 7200 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0