mx01.host-services.com has no MX records.
Question and response
Question
dig mx01.host-services.com. MX
Answer
The response has no answer records.
Authority
host-services.com. 86400 SOA dns1.host-redirect.com. dns.host-redirect.com. 2026021902 10800 3600 1209600 86400
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0