diff --git a/checker/definition.go b/checker/definition.go
index 3bbf968..50d9612 100644
--- a/checker/definition.go
+++ b/checker/definition.go
@@ -14,8 +14,7 @@ func Definition() *sdk.CheckerDefinition {
 		Name:    "Outbound deliverability (via happyDeliver)",
 		Version: Version,
 		Availability: sdk.CheckerAvailability{
-			ApplyToService:  true,
-			LimitToServices: []string{"svcs.MXs"},
+			ApplyToService: true,
 		},
 		ObservationKeys: []sdk.ObservationKey{ObservationKeyHappyDeliver},
 		Options: sdk.CheckerOptionsDocumentation{