Manage my DNA at a non-DH nameserver.
Have successfully setup A and CName records pointing domain names to new DH site.
Not sure what appropriate MX records should look like to use DH mail account.
Is it the same as displayed on DNS settings for this domain?
e.g. mx1.sub4.homie.mail.dreamhost.com. ???
It depends on how the external panel is asking for information.
MX records are composed with a weighting number followed by a space then the server.