What about using the redirect or mirror options to point to a dreamhosters.com page, or perhaps the Parked option to show a 'coming soon message'. I am not sure if this (redirection/parking) affects the email at the same time. Not really experimented with it.
These are options under the manage domains>edit icon.
Opinions are my own views, not DreamHosts'.
I am NOT a DreamHost employee OK!! :@
You act on my advice at your own risk!