NS1.F5CLOUDSERVICES.COM has no MX records.
Question and response
Question
dig NS1.F5CLOUDSERVICES.COM. MX
Answer
The response has no answer records.
Authority
F5CLOUDSERVICES.COM. 1800 SOA ns1.f5clouddns.COM. dns-admin\@f5cloudservices.COM. 2023020907 86400 7200 604800 1800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0