DealMachine provides the contact information for every property added. This includes email addresses per associated person. To view the email addresses:
Go to Leads and open a lead.
Under Associated Contacts, click the email icon.
Scroll through the other associated contacts by clicking the next dot below the current contact you are viewing or by clicking the arrow button in the lower right corner.
If you are on an old DealMachine plan:
Just open a lead and click the "@" icon beside the owner's name.
Click the email address that you would like to remove.
Click "Delete Email Address".
Click "Really Delete".