Client.sendMessage(): set options.sandbox=true iff sending from sparkpostbox.com

Author: ewandennis

libs/sparkpost-lib/src/main/java/com/sparkpost/Client.java

@@ -8,6 +8,7 @@
 import com.sparkpost.model.AddressAttributes;
 import com.sparkpost.model.RecipientAttributes;
 import com.sparkpost.model.TemplateContentAttributes;
+import com.sparkpost.model.OptionsAttributes;
 import com.sparkpost.model.TransmissionWithRecipientArray;
 import com.sparkpost.model.responses.Response;
 import com.sparkpost.resources.ResourceTransmissions;
@@ -111,6 +112,12 @@ public Response sendMessage(String from, List<String> recipients, String subject
         contentAttributes.setText(text);
         transmission.setContentAttributes(contentAttributes);
 
+        if (from.contains("@sparkpostbox.com")) {
+          OptionsAttributes options = new OptionsAttributes();
+          options.setSandbox(true);
+          transmission.setOptions(options);
+        }
+
         RestConnection connection = new RestConnection(this);
         Response response = ResourceTransmissions.create(connection, 0, transmission);