li230-181.members.linode.com has no MX records.
Question and response
Question
dig li230-181.members.linode.com. MX
Answer
The response has no answer records.
Authority
members.linode.com. 300 SOA a1-249.akam.net. dns.linode.com. 2026012003 3600 600 604800 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0