dynamic.eatel.net has no MX records.
Question and response
Question
dig dynamic.eatel.net. MX
Answer
The response has no answer records.
Authority
dynamic.eatel.net. 3600 SOA ns8.eatel.net. hostmaster.eatel.net. 324300035 7200 3600 10800 10800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0