dynalias.net has no MX records.
Question and response
Question
dig dynalias.net. MX
Answer
The response has no answer records.
Authority
dynalias.net. 600 SOA ns1.dyndns.org. hostmaster.dyndns.org. 2096057865 600 300 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0