gtm01.roch.ny.frontiernet.net has no MX records.
Question and response
Question
dig 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. 2603050003 1800 300 604800 21600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0