diff --git a/core/modules/system/config/schema/system.schema.yml b/core/modules/system/config/schema/system.schema.yml
index 3e14319..8eb5c37 100644
--- a/core/modules/system/config/schema/system.schema.yml
+++ b/core/modules/system/config/schema/system.schema.yml
@@ -334,10 +334,10 @@ system.mail:
   mapping:
     interface:
       type: sequence
-      label: 'Interface'
+      label: 'Interfaces'
       sequence:
         - type: string
-          label: 'Individual interface'
+          label: 'Interface'
 
 system.theme.global:
   type: theme_settings