peakview.rr.com has no MX records.
Question and response
Question
dig peakview.rr.com. MX
Answer
The response has no answer records.
Authority
peakview.rr.com. 3600 SOA dns1.rr.com. hostmaster.charter.com. 2025060008 43200 3600 2419200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0