mail5258.e.hushhush.com has no MX records.
Question and response
Question
dig mail5258.e.hushhush.com. MX
Answer
The response has no answer records.
Authority
hushhush.com. 600 SOA ns65.domaincontrol.com. dns.jomax.net. 2026020400 28800 7200 604800 600
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0