diff --git a/admin/survey/classes/class.SurveyInvitationsNew.php b/admin/survey/classes/class.SurveyInvitationsNew.php
index ddf37808c..c9492e5c7 100644
--- a/admin/survey/classes/class.SurveyInvitationsNew.php
+++ b/admin/survey/classes/class.SurveyInvitationsNew.php
@@ -9925,7 +9925,25 @@ class SurveyInvitationsNew {
 		echo '</p>';
 		# replyTo
 		echo '<p><label>'.$lang['srv_email_setting_reply'].'<input type="text" name="SMTPReplyTo0" value="'.$enkaSettings['SMTPReplyTo'].'" ></label>';
-		echo '</p>';
+        echo '</p>';
+        #delay 
+		echo '<p><label>'.$lang['srv_email_setting_smtp_delay'].': <select name="SMTPDelay0">'
+            . '<option value="0" '.($enkaSettings['SMTPDelay']=="0"?'selected="selected"':'') .'>0 </option>'
+            . '<option value="10000" '.($enkaSettings['SMTPDelay']=="10000"?'selected="selected"':'') .'>0.01 sec (max 100 / sec)</option>'
+            . '<option value="20000" '.($enkaSettings['SMTPDelay']=="20000"?'selected="selected"':'') .'>0.02 sec (max 50 / sec)</option>'
+            . '<option value="50000" '.($enkaSettings['SMTPDelay']=="50000"?'selected="selected"':'') .'>0.05 sec (max 20 / sec)</option>'
+            . '<option value="100000" '.($enkaSettings['SMTPDelay']=="100000"?'selected="selected"':'') .'>0.1 sec (max 10 / sec)</option>'
+            . '<option value="200000" '.($enkaSettings['SMTPDelay']=="200000"?'selected="selected"':'') .'>0.2 sec (max 5 / sec)</option>'
+            . '<option value="500000" '.($enkaSettings['SMTPDelay']=="500000"?'selected="selected"':'') .'>0.5 sec (max 2 / sec)</option>'
+            . '<option value="1000000" '.($enkaSettings['SMTPDelay']=="1000000"?'selected="selected"':'') .'>1 sec (max 1 / sec)</option>'
+            . '<option value="2000000" '.($enkaSettings['SMTPDelay']=="2000000"?'selected="selected"':'') .'>2 sec (max 30 / min)</option>'
+            . '<option value="4000000" '.($enkaSettings['SMTPDelay']=="4000000"?'selected="selected"':'') .'>4 sec (max 15 / min)</option>'
+            . '<option value="5000000" '.($enkaSettings['SMTPDelay']=="5000000"?'selected="selected"':'') .'>5 sec (max 12 / min)</option>'
+            . '<option value="10000000" '.($enkaSettings['SMTPDelay']=="10000000"?'selected="selected"':'') .'>10 sec (max 6 / min)</option>'
+            . '<option value="20000000" '.($enkaSettings['SMTPDelay']=="20000000"?'selected="selected"':'') .'>20 sec (max 3 / min)</option>'
+            . '<option value="30000000" '.($enkaSettings['SMTPDelay']=="30000000"?'selected="selected"':'') .'>30 sec (max 2 / min)</option>'
+            . '</select></label>';
+        echo '</p>';
 		echo '</div>';
 		
 		#GMAIL - Google