diff --git a/checker/definition.go b/checker/definition.go
index 06094aa..81ada06 100644
--- a/checker/definition.go
+++ b/checker/definition.go
@@ -15,7 +15,11 @@ func (p *autoconfigProvider) Definition() *sdk.CheckerDefinition {
 		Name:    "Email Autoconfiguration",
 		Version: Version,
 		Availability: sdk.CheckerAvailability{
-			ApplyToDomain: true,
+			ApplyToService: true,
+			LimitToServices: []string{
+				"abstract.EmailAutoConfig",
+				"abstract.RFC6186",
+			},
 		},
 		ObservationKeys: []sdk.ObservationKey{ObservationKeyAutoconfig},
 		HasHTMLReport:   true,