ha-net.ptd.net has no MX records.
Question and response
Question
dig ha-net.ptd.net. MX
Answer
The response has no answer records.
Authority
ha-net.ptd.net. 3600 SOA dns1.ptd.net. dns-request.corp.ptd.net. 2026012601 10800 3600 604800 10800
Additional
. 0 OPT ; payload 512, xrcode 0, version 0, flags 0