diff --git a/product/ERP5/Document/EmailDocument.py b/product/ERP5/Document/EmailDocument.py
index ac05571be73c1c64301f87bba906b420f905186b..4ce2218efdcff9ffbc9829c65f0ae4eecf3c9122 100644
--- a/product/ERP5/Document/EmailDocument.py
+++ b/product/ERP5/Document/EmailDocument.py
@@ -507,7 +507,11 @@ class EmailDocument(File, TextDocument):
                                        attachment_list=attachment_list,
                                        additional_headers=additional_headers)
       mail_message = mime_message.as_string()
-      self.activate(activity='SQLQueue').sendMailHostMessage(mail_message)
+      try:
+        self.activate(activity='SQLQueue').sendMailHostMessage(mail_message)
+      except TypeError:
+        # temporary document does not support activation.
+        self.MailHost.send(mail_message)
 
     # Save one of mail messages.
     self.setData(mail_message)