mail11159.email.steincollection.com has no MX records.
Question and response
Question
dig mail11159.email.steincollection.com. MX
Answer
The response has no answer records.
Authority
steincollection.com. 600 SOA ns33.domaincontrol.com. dns.jomax.net. 2026012603 28800 7200 604800 600
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0