spf2.clink.hk has no MX records.
Question and response
Question
dig spf2.clink.hk. MX
Answer
The response has no answer records.
Authority
clink.hk. 3600 SOA dns1.communilink.net. hostmaster.communilink.net. 2025093094 28800 7200 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0