Your personal information on the postcards is controlled by your account signature.
To make changes, open your DealMachine Account.
Go to to Mailers.
Make sure not to create a new signature but instead tap on your existing signature. It's usually the first one on the list.
Be sure to update your phone number, email address and your other personal information.
Here's Elise showing you how it's done.
You may still need to hit "Reload Preview" on older deals to see the changes but all postcards would now use the updated information.
Hope this helps. If you have questions, please reach out to our Customer Support Team using the Help & Support option in your account.
They're available every day including weekends from 9am - 9pm EST.