smtp.buckeyecom.net has no MX records.
Question and response
Question
dig smtp.buckeyecom.net. MX
Answer
The response has no answer records.
Authority
buckeyecom.net. 3600 SOA ns1.buckeyecom.net. hostmaster.buckeye-access.com. 2026012001 86400 300 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0