hcsh3.hostcolor.net has no MX records.
Question and response
Question
dig hcsh3.hostcolor.net. MX
Answer
The response has no answer records.
Authority
hostcolor.net. 86400 SOA nsc1.hostcolor.us. monitoring.hostcolor.com. 2024061801 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0