Add reply_to in the template schema

app/schemas.py

@@ -315,11 +315,14 @@ class BaseTemplateSchema(BaseSchema):
     reply_to = fields.Method("get_reply_to", allow_none=True)
 
     def get_reply_to(self, template):
+        if template.template_type == 'letter':
+            text = template.get_reply_to_text()
+            return text
         return template.reply_to
 
     class Meta:
         model = models.Template
-        exclude = ("service_id", "jobs", "service_letter_contact_id")
+        exclude = ("service_id", "jobs")
         strict = True