Open your DealMachine mobile app or log on with your computer to Dealmachine.com
Go to the Leads tab.
Click the box right next to the Property Address Header.
Next, click the Select All Leads option.
Click More then select Pause Mail.
Click Pause Mail on the confirmation box and you're all set.
Hope this helps. Please feel free to reach out to your Support team should you need help with anything else.