Dynamic fields will only work when you're using a template. Individual one-off emails that you write won't fill these out.
There are 3 types of dynamic fields you will see with ToutApp. These fields include Basic, Custom, and Salesforce. Basic and Custom both look to pull information from ToutApp.com. If the information does not exist in ToutApp.com the fields will be blank. Salesforce fields pull information from Salesforce.com.
Troubleshooting Salesforce Fields
Salesforce Fields: eg {{sfdc_account_name}}
Troubleshooting Basic and Custom Fields
ToutApp Basic Fields: eg {{company}}
ToutApp Custom Fields: eg {{custom_field_favorite_movie}}