haproxy2.mailbaby.net has no MX records.
Question and response
Question
dig haproxy2.mailbaby.net. MX
Answer
The response has no answer records.
Authority
mailbaby.net. 1800 SOA josh.ns.cloudflare.com. dns.cloudflare.com. 2396680779 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0