Hi, I was using your tool to lookup MX records for us.redbull.com and the tool said that none existed. From my mail server I did an nslookup and found that there were many.
Here are the records
Non-authoritative answer:
us.redbull.com MX preference = 20, mail exchanger = cluster1a.eu.messagelabs.co
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us.redbull.com MX preference = 10, mail exchanger = cluster1.eu.messagelabs.com
cluster1a.eu.messagelabs.com internet address = 216.82.248.45
cluster1a.eu.messagelabs.com internet address = 85.158.141.190
cluster1a.eu.messagelabs.com internet address = 216.82.248.44
Hope this helps. I like the toll a lot. Thansk.
John