diff --git a/config-templates/config.php b/config-templates/config.php
index b9e9e004393557ef45a495315ef162fa3988ae7e..9c5ea13c86045c7f2beb86fe504debe65a2742a1 100644
--- a/config-templates/config.php
+++ b/config-templates/config.php
@@ -55,7 +55,9 @@ $config = array(
     'technicalcontact_email' => 'na@example.org',
 
     /*
-     * Sender email should use the same domain as your application domain to prevent SPF record filtering
+     * The envelope from address for outgoing emails.
+     * This should be in a domain that has your application's IP addresses in its SPF record
+     * to prevent it from being rejected by mail filters.
      */
     //'sendmail_from' => 'no-reply@example.org',