tdatacenter.com has no MX records.
Question and response
Question
dig tdatacenter.com. MX
Answer
The response has no answer records.
Authority
tdatacenter.com. 300 SOA nsjc8hos01.telefonica-data.com. dnsadmin.tsai.es. 2012042310 86400 7200 2592000 300
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0