diff --git a/source/java/org/alfresco/repo/action/executer/MailActionExecuter.java b/source/java/org/alfresco/repo/action/executer/MailActionExecuter.java
index 539e50c49a..15bb9086d5 100644
--- a/source/java/org/alfresco/repo/action/executer/MailActionExecuter.java
+++ b/source/java/org/alfresco/repo/action/executer/MailActionExecuter.java
@@ -201,6 +201,7 @@ public class MailActionExecuter extends ActionExecuterAbstractBase
      */
     private boolean testMode = false;
     private MimeMessage lastTestMessage;
+    private int testSentCount;
 
     private TemplateImageResolver imageResolver;
 
@@ -519,6 +520,16 @@ public class MailActionExecuter extends ActionExecuterAbstractBase
     
     private MimeMessageHelper[] prepareEmails(final Action ruleAction, final NodeRef actionedUponNodeRef)
     {
+        Serializable ref = ruleAction.getParameterValue(PARAM_TEMPLATE);
+        String templateRef = (ref instanceof NodeRef ? ((NodeRef)ref).toString() : (String)ref);
+        if (templateRef == null)
+        {
+            // send as bulk message if there is no template
+            MimeMessageHelper[] messages = new MimeMessageHelper[1];
+            messages[0] = prepareEmail(ruleAction, actionedUponNodeRef, null, null);
+            return messages;
+        }
+        
         List<Pair<String, Locale>> recipients = getRecipients(ruleAction);
         
         Pair<InternetAddress, Locale> from = getFrom(ruleAction);
@@ -941,6 +952,7 @@ public class MailActionExecuter extends ActionExecuterAbstractBase
             else
             {
                 lastTestMessage = preparedMessage.getMimeMessage();
+                testSentCount++;
             }
         }
         catch (MailException e)
@@ -1479,6 +1491,16 @@ public class MailActionExecuter extends ActionExecuterAbstractBase
         return lastTestMessage; 
     }
     
+    public int getTestSentCount()
+    {
+        return testSentCount; 
+    }
+    
+    public int resetTestSentCount()
+    {
+        return testSentCount = 0; 
+    }
+    
     /**
      * Used when test mode is enabled.
      * Clears the record of the last message that was sent. 
diff --git a/source/test-java/org/alfresco/repo/action/executer/AbstractMailActionExecuterTest.java b/source/test-java/org/alfresco/repo/action/executer/AbstractMailActionExecuterTest.java
index 230400f712..e974a15a8a 100644
--- a/source/test-java/org/alfresco/repo/action/executer/AbstractMailActionExecuterTest.java
+++ b/source/test-java/org/alfresco/repo/action/executer/AbstractMailActionExecuterTest.java
@@ -20,20 +20,22 @@ package org.alfresco.repo.action.executer;
 
 import java.io.IOException;
 import java.io.Serializable;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Date;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 
 import javax.mail.Address;
 import javax.mail.Message;
 import javax.mail.MessagingException;
+import javax.mail.internet.InternetAddress;
 import javax.mail.internet.MimeMessage;
 
 import org.alfresco.model.ContentModel;
 import org.alfresco.repo.management.subsystems.ApplicationContextFactory;
 import org.alfresco.repo.security.authentication.AuthenticationUtil;
-import org.alfresco.repo.security.authentication.AuthenticationUtil.RunAsWork;
 import org.alfresco.repo.tenant.TenantService;
 import org.alfresco.repo.tenant.TenantUtil;
 import org.alfresco.repo.tenant.TenantUtil.TenantRunAsWork;
@@ -429,4 +431,51 @@ public abstract class AbstractMailActionExecuterTest
         
         AuthenticationUtil.clearCurrentSecurityContext();
     }
+    
+    /**
+     * Test for MNT-11488
+     * @throws Exception 
+     */
+    @Test
+    public void testSendingToMultipleUsers() throws IOException, MessagingException
+    {
+        final String USER_1 = "recipient1";
+        final String USER_2 = "recipient2";
+        final String[] recipientsArray = { USER_1 + "@email.com", USER_2 + "@email.com" };
+        final List<String> recipientsResult = new ArrayList<String>(Arrays.asList(recipientsArray)) ;
+
+        try
+        {
+            createUser(USER_1, null);
+            createUser(USER_2, null);
+            ArrayList<String> recipients = new ArrayList<String>(2);
+            recipients.add(USER_1);
+            recipients.add(USER_2);
+
+            Action mailAction = ACTION_SERVICE.createAction(MailActionExecuter.NAME);
+            mailAction.setParameterValue(MailActionExecuter.PARAM_FROM, "sender@example.com");
+            mailAction.setParameterValue(MailActionExecuter.PARAM_TO_MANY, recipients);
+            mailAction.setParameterValue(MailActionExecuter.PARAM_SUBJECT, "Testing");
+            mailAction.setParameterValue(MailActionExecuter.PARAM_TEMPLATE_MODEL, (Serializable) getModel());
+
+            ACTION_EXECUTER.resetTestSentCount();
+
+            ACTION_SERVICE.executeAction(mailAction, null);
+
+            MimeMessage message = ACTION_EXECUTER.retrieveLastTestMessage();
+            Assert.assertNotNull(message);
+            Assert.assertEquals("One email should be sent", 1, ACTION_EXECUTER.getTestSentCount());
+            Assert.assertEquals("All recipients should receive single message", 2, message.getAllRecipients().length);
+            
+            Assert.assertTrue("Both users should receive message", recipientsResult.contains(((InternetAddress) message.getAllRecipients()[0]).getAddress()));
+            Assert.assertTrue("Both users should receive message", recipientsResult.contains(((InternetAddress) message.getAllRecipients()[1]).getAddress()));
+        }
+        finally
+        {
+            // tidy up
+            PERSON_SERVICE.deletePerson(USER_1);
+            PERSON_SERVICE.deletePerson(USER_2);
+        }
+    }
+
 }