fg.peakinternet.com has no MX records.
Question and response
Question
dig fg.peakinternet.com. MX
Answer
The response has no answer records.
Authority
peakinternet.com. 300 SOA ns1.peak.org. hostmaster.peak.org. 2026021801 3600 900 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0