ns03.transtelco.net has no MX records.
Question and response
Question
dig ns03.transtelco.net. MX
Answer
The response has no answer records.
Authority
transtelco.net. 180 SOA ns0.dnsmadeeasy.com. dns.dnsmadeeasy.com. 2008011918 43200 3600 1209600 180
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0