diff --git a/checker/definition.go b/checker/definition.go
index ecdef33..3bbf968 100644
--- a/checker/definition.go
+++ b/checker/definition.go
@@ -14,7 +14,6 @@ func Definition() *sdk.CheckerDefinition {
 		Name:    "Outbound deliverability (via happyDeliver)",
 		Version: Version,
 		Availability: sdk.CheckerAvailability{
-			ApplyToDomain:   true,
 			ApplyToService:  true,
 			LimitToServices: []string{"svcs.MXs"},
 		},