ns1.telconet.net has no MX records.
Question and response
Question
dig ns1.telconet.net. MX
Answer
The response has no answer records.
Authority
telconet.net. 900 SOA srv1.telconet.net. hostmaster.telconet.net. 2589 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0