How do I use additional custom fields in HTML templates for HerbMail Postal?

In order to utilize additional custom fields in HTML templates, you will need to:

1. Include additional custom fields (variables) in your HTML templates
   
2. Add additional custom fields in your Postal configuration
   
   
   
   • If you use custom fields please add value for those custom fields to make sure test custom field values are generated properly in your postcard preview
     
     Note: If the preview of your postcard contains test values that you provided for custom fields, it means that your mapping is correct and you can proceed to the next step.
     
     
3. Send Custom Fields to HerbMail Postal Webhook
   
   {
   "integration_id": "Integration ID you copied from the dashboard",
   "email": "email address of the contact"
   "custom_fields":
   {
   "customfield1": "Value of custom field 1",
   "customfield2": "Value of custom field 2"
   }
   }