Index: modules/system/system.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.module,v
retrieving revision 1.1003
diff -u -p -r1.1003 system.module
--- modules/system/system.module	4 Jan 2011 00:56:23 -0000	1.1003
+++ modules/system/system.module	22 Jan 2011 13:29:47 -0000
@@ -3085,10 +3085,10 @@ function system_send_email_action_form($
 
   $form['recipient'] = array(
     '#type' => 'textfield',
-    '#title' => t('Recipient'),
+    '#title' => t('Recipients'),
     '#default_value' => $context['recipient'],
     '#maxlength' => '254',
-    '#description' => t('The email address to which the message should be sent OR enter [node:author:mail], [comment:author:mail], etc. if you would like to send an e-mail to the author of the original post.'),
+    '#description' => t('The email address(es) to which the message should be sent OR enter [node:author:mail], [comment:author:mail], etc., if you would like to send an e-mail to the author of the original post. Use commas to separate multiple recipients.'),
   );
   $form['subject'] = array(
     '#type' => 'textfield',
@@ -3114,10 +3114,12 @@ function system_send_email_action_form($
 function system_send_email_action_validate($form, $form_state) {
   $form_values = $form_state['values'];
   // Validate the configuration form.
-  if (!valid_email_address($form_values['recipient']) && strpos($form_values['recipient'], ':mail') === FALSE) {
-    // We want the literal %author placeholder to be emphasized in the error message.
-    form_set_error('recipient', t('Enter a valid email address or use a token e-mail address such as %author.', array('%author' => '[node:author:mail]')));
-  }
+  foreach (explode(',', $form_values['recipient']) as $recipient) {
+    if (!valid_email_address(trim($recipient)) && strpos(trim($recipient), ':mail') === FALSE) {
+      // We want the literal %author placeholder to be emphasized in the error message.
+      form_set_error('recipient', t('Enter valid comma separated email address(es) or use a token e-mail address such as %author.', array('%author' => '[node:author:mail]')));
+    }
+  }  
 }
 
 /**
@@ -3143,7 +3145,7 @@ function system_send_email_action_submit
  *   provided.
  * @param array $context
  *   Array with the following elements:
- *   - 'recipient': E-mail message recipient. This will be passed through
+ *   - 'recipient': E-mail message recipients. This will be passed through
  *     token_replace().
  *   - 'subject': The subject of the message. This will be passed through
  *     token_replace().
@@ -3158,25 +3160,27 @@ function system_send_email_action($entit
     $context['node'] = $entity;
   }
 
-  $recipient = token_replace($context['recipient'], $context);
-
-  // If the recipient is a registered user with a language preference, use
-  // the recipient's preferred language. Otherwise, use the system default
-  // language.
-  $recipient_account = user_load_by_mail($recipient);
-  if ($recipient_account) {
-    $language = user_preferred_language($recipient_account);
-  }
-  else {
-    $language = language_default();
-  }
+  $recipients = token_replace($context['recipient'], $context);
   $params = array('context' => $context);
-
-  if (drupal_mail('system', 'action_send_email', $recipient, $language, $params)) {
-    watchdog('action', 'Sent email to %recipient', array('%recipient' => $recipient));
-  }
-  else {
-    watchdog('error', 'Unable to send email to %recipient', array('%recipient' => $recipient));
+  
+  foreach (explode(',', $recipients) as $recipient) {
+    $recipient = trim($recipient);
+    // If the recipient is a registered user with a language preference, use
+    // the recipient's preferred language. Otherwise, use the system default
+    // language
+    $recipient_account = user_load_by_mail($recipient);
+    if ($recipient_account) {
+      $language = user_preferred_language($recipient_account);
+    }
+    else {
+      $language = language_default();
+    }
+    if (drupal_mail('system', 'action_send_email', $recipient, $language, $params)) {
+      watchdog('action', 'Sent email to %recipient', array('%recipient' => $recipient));
+    }
+    else {
+      watchdog('error', 'Unable to send email to %recipient', array('%recipient' => $recipient));
+    }
   }
 }