Index: main/plugin-newsletter/src/org/ametys/plugins/newsletter/workflow/SendNewsletterFunction.java
===================================================================
--- main/plugin-newsletter/src/org/ametys/plugins/newsletter/workflow/SendNewsletterFunction.java	(revision 38980)
+++ main/plugin-newsletter/src/org/ametys/plugins/newsletter/workflow/SendNewsletterFunction.java	(working copy)
@@ -214,9 +214,7 @@
     {
         SitemapSource src = null;
         Request request = getRequest();
-        
-        boolean includeImages = _siteConfiguration.getValueAsBoolean(content.getSiteName(), "newsletter-mail-include-images");
-        
+        boolean includeImages = _siteConfiguration.getValueAsBoolean(content.getSiteName(), "newsletter-mail-include-images", false);
         if (includeImages)
         {
             request.setAttribute("forceBase64Encoding", true);