us1.workspace.org has no MX records.
Question and response
Question
dig us1.workspace.org. MX
Answer
The response has no answer records.
Authority
workspace.org. 86400 SOA ns1.private-nameserver.net. admin.workspace.org. 2025112903 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0