spf6.fairpoint.net has no MX records.
Question and response
Question
dig spf6.fairpoint.net. MX
Answer
The response has no answer records.
Authority
fairpoint.net. 900 SOA ns1.neonova.net. hostmaster.neonova.net. 2024102900 43200 3600 604800 900
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0