mailsorter.ma.tmpw.net has no MX records.
Question and response
Question
dig mailsorter.ma.tmpw.net. MX
Answer
The response has no answer records.
Authority
ma.tmpw.net. 3600 SOA ns1.tmpw.net. hostmaster.tmpw.net. 1771656604 1800 600 604800 86400
Additional
The response has no additional records.