spf.ghostservices.net has no MX records.
Question and response
Question
dig spf.ghostservices.net. MX
Answer
The response has no answer records.
Authority
ghostservices.net. 1800 SOA emily.ns.cloudflare.com. dns.cloudflare.com. 2395308533 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0