diff --git a/drupal/sites/all/modules/smtp/smtp.module b/drupal/sites/all/modules/smtp/smtp.module
index 694516f..ae5ade2 100644
--- a/drupal/sites/all/modules/smtp/smtp.module
+++ b/drupal/sites/all/modules/smtp/smtp.module
@@ -848,7 +848,8 @@ function _smtp_get_substring($source, $target, $beginning_character, $ending_cha
 }  //  End of _smtp_get_substring().
 
 if (!strpos(variable_get('smtp_library', ''), 'mimemail') &&
-      !function_exists('drupal_mail_wrapper') ) {
+      !function_exists('drupal_mail_wrapper') &&
+      variable_get('smtp_on', 0)) {
 
   function drupal_mail_wrapper($message) {
     return smtp_drupal_mail_wrapper($message);