e210.en25.com has no MX records.
Question and response
Question
dig e210.en25.com. MX
Answer
The response has no answer records.
Authority
en25.com. 300 SOA ns1.p201.dns.oraclecloud.net. hostmaster.en25.com. 7851 3600 600 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0