diff --git a/app/DataMapper/Analytics/EmailFailure.php b/app/DataMapper/Analytics/EmailFailure.php
index a1820f855096..d91e37725b37 100644
--- a/app/DataMapper/Analytics/EmailFailure.php
+++ b/app/DataMapper/Analytics/EmailFailure.php
@@ -45,7 +45,7 @@ class EmailFailure
      *
      * @var string
      */
-    public $string_metric5 = '';
+    public $string_metric5 = 'stub';
 
     /**
      * The exception string
@@ -53,7 +53,7 @@ class EmailFailure
      *
      * @var string
      */
-    public $string_metric6 = '';
+    public $string_metric6 = 'stub';
 
     /**
      * The counter
diff --git a/app/DataMapper/Analytics/EmailSuccess.php b/app/DataMapper/Analytics/EmailSuccess.php
index da6985b773fd..bd39f7cd695b 100644
--- a/app/DataMapper/Analytics/EmailSuccess.php
+++ b/app/DataMapper/Analytics/EmailSuccess.php
@@ -46,7 +46,7 @@ class EmailSuccess
      *
      * @var string
      */
-    public $string_metric5 = '';
+    public $string_metric5 = 'stub';
 
     /**
      * The exception string
@@ -54,7 +54,7 @@ class EmailSuccess
      *
      * @var string
      */
-    public $string_metric6 = '';
+    public $string_metric6 = 'stub';
 
     /**
      * The counter