diff --git a/app/assets/javascripts/app/lib/app_post/utils.coffee b/app/assets/javascripts/app/lib/app_post/utils.coffee
index 85756ceca..6b7c21eef 100644
--- a/app/assets/javascripts/app/lib/app_post/utils.coffee
+++ b/app/assets/javascripts/app/lib/app_post/utils.coffee
@@ -932,7 +932,7 @@ class App.Utils
 
       # if sender is customer but in article.from is no email, try to get
       # customers email via customer user
-      if articleNew.to && !articleNew.to.match(/@/)
+      if (articleNew.to && !articleNew.to.match(/@/)) || !articleNew.to
         articleNew.to = ticket.customer.email
 
       return articleNew
diff --git a/public/assets/tests/html_utils.js b/public/assets/tests/html_utils.js
index 1e2ebe41e..4c60dd4f6 100644
--- a/public/assets/tests/html_utils.js
+++ b/public/assets/tests/html_utils.js
@@ -1814,7 +1814,7 @@ test('check getRecipientArticle format', function() {
     },
   }
   result = {
-    to:          '',
+    to:          customer.email,
     cc:          '',
     body:        '',
     in_reply_to: 'message_id2',
@@ -1839,6 +1839,7 @@ test('check getRecipientArticle format', function() {
     sender: {
       name: 'Agent',
     },
+    from: 'article_created_by@example.com',
     created_by: {
       login: 'login',
       firstname: 'firstname',
@@ -1847,7 +1848,7 @@ test('check getRecipientArticle format', function() {
     },
   }
   result = {
-    to:          '',
+    to:          customer.email,
     cc:          '',
     body:        '',
     in_reply_to: 'message_id3',