diff --git a/src/Form/BasicSetup.php b/src/Form/BasicSetup.php
index 79d4ac8..f66e1a8 100644
--- a/src/Form/BasicSetup.php
+++ b/src/Form/BasicSetup.php
@@ -256,8 +256,22 @@ class BasicSetup extends FormBase {
           '@uid' => $account->id(),
         ]);
 
-        $params = array('account' => $account);
-        \Drupal::service('plugin.manager.mail')->mail('tfa', 'tfa_enabled_configuration', $account->getEmail(), $account->getPreferredLangcode(), $params);
+        // @todo - Temporary fix for preventing emails from sending when setting up a fallback plugin.
+        // @todo - Remove this check along side removal of fallback concept in #2924691
+        $validation_plugin_manager = \Drupal::service('plugin.manager.tfa.validation');
+        $validation_plugins = $validation_plugin_manager->getDefinitions();
+        $validation_plugin_id = str_replace('_setup', '', $storage['step_method']);
+        $current_plugin_is_fallback = FALSE;
+
+        if (isset($validation_plugins[$validation_plugin_id])) {
+          $validation_plugin = $validation_plugin_manager->createInstance($validation_plugin_id, ['uid' => $account->id()]);
+          $current_plugin_is_fallback = $validation_plugin->isFallback();
+        }
+
+        if (!$current_plugin_is_fallback) {
+          $params = array('account' => $account);
+          \Drupal::service('plugin.manager.mail')->mail('tfa', 'tfa_enabled_configuration', $account->getEmail(), $account->getPreferredLangcode(), $params);
+        }
       }
     }
   }