diff --git a/relay/handlers/event.go b/relay/handlers/event.go
index a78e1b9..d037192 100644
--- a/relay/handlers/event.go
+++ b/relay/handlers/event.go
@@ -17,17 +17,20 @@ import (
 func HandleEvent(ws *websocket.Conn, message []interface{}) {
 	if len(message) != 2 {
 		fmt.Println("Invalid EVENT message format")
+		response.SendNotice(ws, "", "Invalid EVENT message format")
 		return
 	}
 
 	eventData, ok := message[1].(map[string]interface{})
 	if !ok {
 		fmt.Println("Invalid event data format")
+		response.SendNotice(ws, "", "Invalid event data format")
 		return
 	}
 	eventBytes, err := json.Marshal(eventData)
 	if err != nil {
 		fmt.Println("Error marshaling event data:", err)
+		response.SendNotice(ws, "", "Error marshaling event data")
 		return
 	}
 
@@ -35,54 +38,33 @@ func HandleEvent(ws *websocket.Conn, message []interface{}) {
 	err = json.Unmarshal(eventBytes, &evt)
 	if err != nil {
 		fmt.Println("Error unmarshaling event data:", err)
+		response.SendNotice(ws, "", "Error unmarshaling event data")
 		return
 	}
 
-	HandleKind(context.TODO(), evt, ws, eventBytes)
+	eventSize := len(eventBytes) // Calculate event size
+	HandleKind(context.TODO(), evt, ws, eventSize)
 
 	fmt.Println("Event processed:", evt.ID)
 }
 
-func HandleKind(ctx context.Context, evt relay.Event, ws *websocket.Conn, eventBytes []byte) {
+func HandleKind(ctx context.Context, evt relay.Event, ws *websocket.Conn, eventSize int) {
 	if !utils.CheckSignature(evt) {
 		response.SendOK(ws, evt.ID, false, "invalid: signature verification failed")
 		return
 	}
 
 	collection := db.GetCollection(evt.Kind)
-
 	rateLimiter := utils.GetRateLimiter()
 	sizeLimiter := utils.GetSizeLimiter()
-	var category string
-	switch {
-	case evt.Kind == 0:
-		category = "replaceable"
-	case evt.Kind == 1:
-		category = "regular"
-	case evt.Kind == 2:
-		category = "deprecated"
-	case evt.Kind == 3:
-		category = "replaceable"
-	case evt.Kind >= 4 && evt.Kind < 45:
-		category = "regular"
-	case evt.Kind >= 1000 && evt.Kind < 10000:
-		category = "regular"
-	case evt.Kind >= 10000 && evt.Kind < 20000:
-		category = "replaceable"
-	case evt.Kind >= 20000 && evt.Kind < 30000:
-		category = "ephemeral"
-	case evt.Kind >= 30000 && evt.Kind < 40000:
-		category = "parameterized_replaceable"
-	default:
-		category = "unknown"
-	}
+
+	category := determineCategory(evt.Kind)
 
 	if allowed, msg := rateLimiter.AllowEvent(evt.Kind, category); !allowed {
 		response.SendOK(ws, evt.ID, false, msg)
 		return
 	}
 
-	eventSize := len(eventBytes) // Calculate event size
 	if allowed, msg := sizeLimiter.AllowSize(evt.Kind, eventSize); !allowed {
 		response.SendOK(ws, evt.ID, false, msg)
 		return
@@ -93,15 +75,15 @@ func HandleKind(ctx context.Context, evt relay.Event, ws *websocket.Conn, eventB
 	case evt.Kind == 0:
 		err = kinds.HandleKind0(ctx, evt, collection, ws)
 	case evt.Kind == 1:
-		err = kinds.HandleKind1(ctx, evt, collection)
+		err = kinds.HandleKind1(ctx, evt, collection, ws)
 	case evt.Kind == 2:
-		err = kinds.HandleKind2Deprecated(ctx, evt, ws)
+		err = kinds.HandleKind2(ctx, evt, ws)
 	case evt.Kind == 3:
 		err = kinds.HandleReplaceableKind(ctx, evt, collection, ws)
 	case evt.Kind >= 4 && evt.Kind < 45:
-		err = kinds.HandleRegularKind(ctx, evt, collection)
+		err = kinds.HandleRegularKind(ctx, evt, collection, ws)
 	case evt.Kind >= 1000 && evt.Kind < 10000:
-		err = kinds.HandleRegularKind(ctx, evt, collection)
+		err = kinds.HandleRegularKind(ctx, evt, collection, ws)
 	case evt.Kind >= 10000 && evt.Kind < 20000:
 		err = kinds.HandleReplaceableKind(ctx, evt, collection, ws)
 	case evt.Kind >= 20000 && evt.Kind < 30000:
@@ -119,3 +101,20 @@ func HandleKind(ctx context.Context, evt relay.Event, ws *websocket.Conn, eventB
 
 	response.SendOK(ws, evt.ID, true, "")
 }
+
+func determineCategory(kind int) string {
+	switch {
+	case kind == 0, kind == 3, kind >= 10000 && kind < 20000:
+		return "replaceable"
+	case kind == 1, kind >= 4 && kind < 45, kind >= 1000 && kind < 10000:
+		return "regular"
+	case kind == 2:
+		return "deprecated"
+	case kind >= 20000 && kind < 30000:
+		return "ephemeral"
+	case kind >= 30000 && kind < 40000:
+		return "parameterized_replaceable"
+	default:
+		return "unknown"
+	}
+}
diff --git a/relay/handlers/kinds/kind0.go b/relay/handlers/kinds/kind0.go
index 79c98da..8fd6401 100644
--- a/relay/handlers/kinds/kind0.go
+++ b/relay/handlers/kinds/kind0.go
@@ -13,7 +13,6 @@ import (
 )
 
 func HandleKind0(ctx context.Context, evt relay.Event, collection *mongo.Collection, ws *websocket.Conn) error {
-	// Find the existing event with the same pubkey
 	filter := bson.M{"pubkey": evt.PubKey}
 	var existingEvent relay.Event
 	err := collection.FindOne(ctx, filter).Decode(&existingEvent)
@@ -21,16 +20,14 @@ func HandleKind0(ctx context.Context, evt relay.Event, collection *mongo.Collect
 		return fmt.Errorf("error finding existing event: %v", err)
 	}
 
-	// If an existing event is found, compare the created_at times
 	if err != mongo.ErrNoDocuments {
 		if existingEvent.CreatedAt >= evt.CreatedAt {
-			// If the existing event is newer or the same, respond with a NOTICE
-			response.SendNotice(ws, evt.PubKey, "relay already has a newer kind 0 event for this pubkey")
+			response.SendNotice(ws, evt.PubKey, "blocked: a newer kind 0 event already exists for this pubkey")
+			response.SendOK(ws, evt.ID, false, "blocked: a newer kind 0 event already exists for this pubkey")
 			return nil
 		}
 	}
 
-	// Replace the existing event if it has the same pubkey
 	update := bson.M{
 		"$set": bson.M{
 			"id":         evt.ID,
@@ -42,12 +39,13 @@ func HandleKind0(ctx context.Context, evt relay.Event, collection *mongo.Collect
 		},
 	}
 
-	opts := options.Update().SetUpsert(true) // Insert if not found
+	opts := options.Update().SetUpsert(true)
 	_, err = collection.UpdateOne(ctx, filter, update, opts)
 	if err != nil {
+		response.SendOK(ws, evt.ID, false, "error: could not connect to the database")
 		return fmt.Errorf("error updating/inserting event kind 0 into MongoDB: %v", err)
 	}
-
+	response.SendOK(ws, evt.ID, true, "")
 	fmt.Println("Upserted event kind 0 into MongoDB:", evt.ID)
 	return nil
 }
diff --git a/relay/handlers/kinds/kind1.go b/relay/handlers/kinds/kind1.go
index fb38790..78c3611 100644
--- a/relay/handlers/kinds/kind1.go
+++ b/relay/handlers/kinds/kind1.go
@@ -1,21 +1,24 @@
+// kinds/kind1.go
 package kinds
 
 import (
 	"context"
 	"fmt"
-
+	"grain/relay/handlers/response"
 	relay "grain/relay/types"
 
 	"go.mongodb.org/mongo-driver/mongo"
+	"golang.org/x/net/websocket"
 )
 
-func HandleKind1(ctx context.Context, evt relay.Event, collection *mongo.Collection) error {
-	// Insert event into MongoDB
+func HandleKind1(ctx context.Context, evt relay.Event, collection *mongo.Collection, ws *websocket.Conn) error {
 	_, err := collection.InsertOne(ctx, evt)
 	if err != nil {
+		response.SendOK(ws, evt.ID, false, "error: could not connect to the database")
 		return fmt.Errorf("error inserting event into MongoDB: %v", err)
 	}
 
 	fmt.Println("Inserted event kind 1 into MongoDB:", evt.ID)
+	response.SendOK(ws, evt.ID, true, "")
 	return nil
 }
diff --git a/relay/handlers/kinds/kind2.go b/relay/handlers/kinds/kind2.go
index db33c86..a8c2869 100644
--- a/relay/handlers/kinds/kind2.go
+++ b/relay/handlers/kinds/kind2.go
@@ -8,7 +8,12 @@ import (
 	"golang.org/x/net/websocket"
 )
 
-func HandleKind2Deprecated(ctx context.Context, evt relay.Event, ws *websocket.Conn) error {
+func HandleKind2(ctx context.Context, evt relay.Event, ws *websocket.Conn) error {
+	// Send a NOTICE message to inform the client about the deprecation
 	response.SendNotice(ws, evt.PubKey, "kind 2 is deprecated, event not accepted to the relay, please use kind 10002 as defined in NIP-65")
+
+	// Send an OK message to indicate the event was not accepted
+	response.SendOK(ws, evt.ID, false, "invalid: kind 2 is deprecated, use kind 10002 (NIP65)")
+
 	return nil
 }
diff --git a/relay/handlers/kinds/regular.go b/relay/handlers/kinds/regular.go
index 4035315..86c7d65 100644
--- a/relay/handlers/kinds/regular.go
+++ b/relay/handlers/kinds/regular.go
@@ -3,17 +3,21 @@ package kinds
 import (
 	"context"
 	"fmt"
+	"grain/relay/handlers/response"
 	relay "grain/relay/types"
 
 	"go.mongodb.org/mongo-driver/mongo"
+	"golang.org/x/net/websocket"
 )
 
-func HandleRegularKind(ctx context.Context, evt relay.Event, collection *mongo.Collection) error {
+func HandleRegularKind(ctx context.Context, evt relay.Event, collection *mongo.Collection, ws *websocket.Conn) error {
 	_, err := collection.InsertOne(ctx, evt)
 	if err != nil {
+		response.SendOK(ws, evt.ID, false, "error: could not connect to the database")
 		return fmt.Errorf("error inserting event kind %d into MongoDB: %v", evt.Kind, err)
 	}
 
 	fmt.Printf("Inserted event kind %d into MongoDB: %s\n", evt.Kind, evt.ID)
+	response.SendOK(ws, evt.ID, true, "")
 	return nil
-}
\ No newline at end of file
+}
diff --git a/relay/handlers/kinds/replaceable.go b/relay/handlers/kinds/replaceable.go
index 0214956..e07bf54 100644
--- a/relay/handlers/kinds/replaceable.go
+++ b/relay/handlers/kinds/replaceable.go
@@ -22,7 +22,8 @@ func HandleReplaceableKind(ctx context.Context, evt relay.Event, collection *mon
 
 	if err != mongo.ErrNoDocuments {
 		if existingEvent.CreatedAt > evt.CreatedAt || (existingEvent.CreatedAt == evt.CreatedAt && existingEvent.ID < evt.ID) {
-			response.SendNotice(ws, evt.PubKey, "relay already has a newer kind 0 event for this pubkey")
+			response.SendNotice(ws, evt.PubKey, "blocked: relay already has a newer event of the same kind with this pubkey")
+			response.SendOK(ws, evt.ID, false, "blocked: relay already has a newer event of the same kind with this pubkey")
 			return nil
 		}
 	}
@@ -33,9 +34,11 @@ func HandleReplaceableKind(ctx context.Context, evt relay.Event, collection *mon
 	}
 	_, err = collection.UpdateOne(ctx, filter, update, opts)
 	if err != nil {
+		response.SendOK(ws, evt.ID, false, "error: could not connect to the database")
 		return fmt.Errorf("error updating/inserting event kind %d into MongoDB: %v", evt.Kind, err)
 	}
 
 	fmt.Printf("Upserted event kind %d into MongoDB: %s\n", evt.Kind, evt.ID)
+	response.SendOK(ws, evt.ID, true, "")
 	return nil
 }
diff --git a/relay/handlers/kinds/replaceableParameters.go b/relay/handlers/kinds/replaceableParameters.go
index 49be030..1b4c7c5 100644
--- a/relay/handlers/kinds/replaceableParameters.go
+++ b/relay/handlers/kinds/replaceableParameters.go
@@ -29,7 +29,8 @@ func HandleParameterizedReplaceableKind(ctx context.Context, evt relay.Event, co
 
 	if err != mongo.ErrNoDocuments {
 		if existingEvent.CreatedAt > evt.CreatedAt || (existingEvent.CreatedAt == evt.CreatedAt && existingEvent.ID < evt.ID) {
-			response.SendNotice(ws, evt.PubKey, "relay already has a newer event for this pubkey and d tag")
+			response.SendNotice(ws, evt.PubKey, "blocked: relay already has a newer event for this pubkey and d tag")
+			response.SendOK(ws, evt.ID, false, "blocked: relay already has a newer event for this pubkey and d tag")
 			return nil
 		}
 	}
@@ -40,9 +41,11 @@ func HandleParameterizedReplaceableKind(ctx context.Context, evt relay.Event, co
 	}
 	_, err = collection.UpdateOne(ctx, filter, update, opts)
 	if err != nil {
+		response.SendOK(ws, evt.ID, false, "error: could not connect to the database")
 		return fmt.Errorf("error updating/inserting event kind %d into MongoDB: %v", evt.Kind, err)
 	}
 
 	fmt.Printf("Upserted event kind %d into MongoDB: %s\n", evt.Kind, evt.ID)
+	response.SendOK(ws, evt.ID, true, "")
 	return nil
 }
diff --git a/relay/handlers/kinds/unknown.go b/relay/handlers/kinds/unknown.go
index 79a2499..acb2e54 100644
--- a/relay/handlers/kinds/unknown.go
+++ b/relay/handlers/kinds/unknown.go
@@ -11,7 +11,7 @@ import (
 
 func HandleUnknownKind(ctx context.Context, evt relay.Event, collection *mongo.Collection, ws *websocket.Conn) error {
 	// Respond with an OK message indicating the event is not accepted
-	response.SendOK(ws, evt.ID, false, "kind is unknown and not accepted")
+	response.SendOK(ws, evt.ID, false, "invalid: kind is outside the ranges defined in NIP01")
 
 	// Return nil as there's no error in the process, just that the event is not accepted
 	return nil