Index: class.t3lib_tcemain.php
===================================================================
--- class.t3lib_tcemain.php	(revision 5537)
+++ class.t3lib_tcemain.php	(working copy)
@@ -6882,6 +6882,13 @@
 			} else {
 				list($table,$id) = t3lib_div::revExplode('_',$userIdent,2);
 			}
+			if ($table==='be_groups') {
+				if ($userRecords = t3lib_BEfunc::getRecordsByField('be_users', 'usergroup',$id)) {
+					foreach($userRecords as $user) {
+						$emails[$id] = $user['email'];
+					}
+				}
+			}
 			if ($table==='be_users' || $noTablePrefix)	{
 				if ($userRecord = t3lib_BEfunc::getRecord('be_users', $id, 'email'))	{
 					if (strlen(trim($userRecord['email'])))	{