210.89.80.ftth.as8758.net has no MX records.
Question and response
Question
dig 210.89.80.ftth.as8758.net. MX
Answer
The response has no answer records.
Authority
210.89.80.ftth.as8758.net. 86400 SOA ns1.as8758.net. hostmaster.as8758.net. 2019081602 86400 7200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0