diff --git a/pkg/trust/trust_center_access_service.go b/pkg/trust/trust_center_access_service.go
index 35d91985c..fd2775f4b 100644
--- a/pkg/trust/trust_center_access_service.go
+++ b/pkg/trust/trust_center_access_service.go
@@ -58,7 +58,7 @@ const (
 func (tcar *TrustCenterAccessRequest) Validate() error {
 	v := validator.New()
 
-	v.Check(tcar.Email, "email", validator.NotBlacklisted())
+	v.Check(tcar.Email.Domain(), "email", validator.NotBlacklisted())
 
 	return v.Error()
 }
diff --git a/pkg/validator/validator_email.go b/pkg/validator/validator_email.go
index 287b6e595..4b7fcbde0 100644
--- a/pkg/validator/validator_email.go
+++ b/pkg/validator/validator_email.go
@@ -35,7 +35,7 @@ func NotBlacklisted() ValidatorFunc {
 	return func(value any) *ValidationError {
 		err := notOneOfSlice(value)
 
-		if err == nil {
+		if err != nil {
 			return newValidationError(
 				ErrorCodeInvalidEmail,
 				"must not be blacklisted",