dns.gtm01.roch.ny.frontiernet.net has no MX records.
Question and response
Question
dig dns.gtm01.roch.ny.frontiernet.net. MX
Answer
The response has no answer records.
Authority
ny.frontiernet.net. 21600 SOA auth.roch.ny.frontiernet.net. hostmaster.frontiernet.net. 2603090002 1800 300 604800 21600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0