Ability to disable SNS bounce handling

.env.example

@@ -19,4 +19,16 @@ MYSQL_PASSWORD=change_this_password
 MYSQL_ROOT_PASSWORD=change_this_root_password
 
 # API Configuration
-API_TOKEN=change_this_to_a_secure_random_token
+API_TOKEN=change_this_to_a_secure_random_token
+
+# Bounce Handling Configuration (Optional)
+# Set to 'true' to enable SNS webhook bounce handling
+# Set to 'false' to disable and rely on email-based bounce handling
+ENABLE_SNS_WEBHOOKS=false
+ENABLE_BOUNCE_HANDLING=false
+
+# If ENABLE_SNS_WEBHOOKS=true, you need:
+# 1. AWS SNS topic configured
+# 2. SES configured to send notifications to SNS topic  
+# 3. Valid HTTPS domain for webhook endpoint
+# 4. SNS subscription confirmed to your webhook endpoint

BOUNCE_HANDLING_SETUP.md

@@ -1,10 +1,17 @@
-# SES SNS Bounce Handling Setup
+# SES SNS Bounce Handling Setup (Optional)
+
+**⚠️ NOTICE: Bounce handling is optional and disabled by default.**
 
 This document describes how to configure AWS SES and SNS to handle email bounces automatically in the Mail List Manager.
 
+**Prerequisites:**
+- SES production access (not available in sandbox mode)
+- Valid HTTPS domain for webhook endpoint
+- Bounce handling must be enabled in configuration
+
 ## Overview
 
-The system uses AWS Simple Notification Service (SNS) to receive real-time bounce notifications from AWS Simple Email Service (SES). When an email bounces:
+The system can optionally use AWS Simple Notification Service (SNS) to receive real-time bounce notifications from AWS Simple Email Service (SES). When bounce handling is enabled and an email bounces:
 
 1. SES sends a notification to an SNS topic
 2. SNS forwards the notification to your webhook endpoint
@@ -22,13 +29,28 @@ The system uses AWS Simple Notification Service (SNS) to receive real-time bounc
 
 ## Setup Instructions
 
-### 1. Prerequisites
+### 1. Enable Bounce Handling
+
+First, enable bounce handling in your `.env` file:
+
+```bash
+# Enable SNS webhook bounce handling
+ENABLE_SNS_WEBHOOKS=true
+ENABLE_BOUNCE_HANDLING=true
+```
+
+Restart the API container after making this change:
+```bash
+sudo docker-compose restart api
+```
+
+### 2. Prerequisites
 
 - AWS account with SES configured and verified
 - Your Mail List Manager deployed and accessible via HTTPS (required for SNS webhook)
 - Domain or subdomain for webhook (e.g., `https://lists.yourdomain.com`)
 
-### 2. Create SNS Topic
+### 3. Create SNS Topic
 
 1. Log in to AWS Console and navigate to SNS
 2. Click "Create topic"
@@ -38,7 +60,7 @@ The system uses AWS Simple Notification Service (SNS) to receive real-time bounc
 6. Click "Create topic"
 7. **Save the Topic ARN** (you'll need it in step 4) arn:aws:sns:eu-west-2:827164363113:ses-bounces
 
-### 3. Subscribe Your Webhook to SNS Topic
+### 4. Subscribe Your Webhook to SNS Topic
 
 1. In the SNS topic details, click "Create subscription"
 2. Protocol: `HTTPS`
@@ -49,7 +71,7 @@ The system uses AWS Simple Notification Service (SNS) to receive real-time bounc
 5. Click "Create subscription"
 6. The subscription will be in "PendingConfirmation" status
 
-### 4. Confirm SNS Subscription
+### 5. Confirm SNS Subscription
 
 When you create the subscription, SNS will send a `SubscriptionConfirmation` request to your webhook endpoint. The Mail List Manager API automatically confirms this subscription.
 
@@ -61,7 +83,7 @@ When you create the subscription, SNS will send a `SubscriptionConfirmation` req
 3. In the AWS SNS console, refresh the subscriptions list
 4. The status should change from "PendingConfirmation" to "Confirmed"
 
-### 5. Configure SES to Send Bounce Notifications
+### 6. Configure SES to Send Bounce Notifications
 
 1. Navigate to AWS SES console
 2. Go to "Configuration Sets" (or "Verified identities" > select your domain > "Notifications")
@@ -78,7 +100,7 @@ When you create the subscription, SNS will send a `SubscriptionConfirmation` req
    - Include original headers: Enabled (optional)
    - Click "Save changes"
 
-### 6. Verify Setup
+### 7. Verify Setup
 
 #### Test with a Bounce Simulator
 
@@ -108,7 +130,7 @@ Or send to your mailing list with a test recipient:
 5. Find the test member and click the "Bounces" button
 6. You should see the bounce event recorded
 
-### 7. Security Considerations
+### 8. Security Considerations
 
 #### SNS Signature Verification
 
@@ -149,7 +171,7 @@ server {
 }
 ```
 
-### 8. Managing Bounces in the UI
+### 9. Managing Bounces in the UI
 
 #### View Bounce Status
 
@@ -178,7 +200,7 @@ If a member's email has been corrected or verified:
 
 **Note**: Only users with write access (administrators and operators) can reset bounce status.
 
-### 9. Monitoring and Maintenance
+### 10. Monitoring and Maintenance
 
 #### Check Bounce Logs
 

README.md

@@ -172,6 +172,41 @@ docker-compose exec postfix postmap -q "community@lists.sasalliance.org" \
   mysql:/etc/postfix/mysql_virtual_alias_maps.cf
 ```
 
+### Bounce Handling (Optional)
+
+**Email bounce handling is optional and disabled by default.**
+
+**Two Configuration Options:**
+
+1. **SNS Webhooks** (Requires SES Production Access):
+   ```bash
+   # In .env file
+   ENABLE_SNS_WEBHOOKS=true
+   ENABLE_BOUNCE_HANDLING=true
+   ```
+   - Real-time bounce notifications via AWS SNS
+   - Automatic member deactivation for hard bounces
+   - Bounce history tracking and management
+   - Requires valid HTTPS domain and SES production access
+   - See `BOUNCE_HANDLING_SETUP.md` for complete setup
+
+2. **Email-Based Handling** (Default for SES Sandbox):
+   ```bash
+   # In .env file (or leave these commented out)
+   ENABLE_SNS_WEBHOOKS=false
+   ENABLE_BOUNCE_HANDLING=false
+   ```
+   - Manual bounce management via email notifications
+   - No automatic processing - requires manual member cleanup
+   - Works with SES sandbox accounts
+   - Bounce-related UI elements are hidden
+
+**When bounce handling is disabled:**
+- `/webhooks/sns` endpoint is not registered
+- Bounce history endpoints return empty results
+- Web UI hides bounce badges and bounce management buttons
+- No automatic member deactivation occurs
+
 ## Security
 
 - **Environment Variables**: All credentials stored in `.env` (git-ignored)

api/main.py

@@ -43,6 +43,10 @@ MYSQL_DATABASE = os.getenv('MYSQL_DATABASE', 'maillist')
 MYSQL_USER = os.getenv('MYSQL_USER', 'maillist')
 MYSQL_PASSWORD = os.getenv('MYSQL_PASSWORD', '')
 
+# Bounce handling configuration
+ENABLE_SNS_WEBHOOKS = os.getenv('ENABLE_SNS_WEBHOOKS', 'false').lower() == 'true'
+ENABLE_BOUNCE_HANDLING = os.getenv('ENABLE_BOUNCE_HANDLING', 'false').lower() == 'true'
+
 # Password hashing
 pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
 
@@ -463,6 +467,14 @@ async def health():
     except Exception as e:
         raise HTTPException(status_code=503, detail=f"Unhealthy: {str(e)}")
 
+@app.get("/config")
+async def get_config():
+    """Get public configuration settings"""
+    return {
+        "bounce_handling_enabled": ENABLE_BOUNCE_HANDLING,
+        "sns_webhooks_enabled": ENABLE_SNS_WEBHOOKS
+    }
+
 # Mailing Lists endpoints
 @app.get("/lists", response_model=List[MailingList])
 async def get_lists(current_user: CurrentUser = require_read_access()):
@@ -824,298 +836,316 @@ async def bulk_import_members(bulk_request: BulkImportRequest, current_user: Cur
             cursor.close()
             raise HTTPException(status_code=500, detail=f"Bulk import failed: {str(e)}")
 
-# SNS Webhook for Bounce Handling
-async def verify_sns_signature(request: Request) -> dict:
-    """Verify SNS message signature"""
-    try:
-        body = await request.body()
-        print(f"SNS webhook received body: {body}")
-        print(f"SNS webhook body length: {len(body)}")
-        print(f"SNS webhook headers: {dict(request.headers)}")
-        
-        if not body:
-            print("ERROR: Empty body received")
-            raise HTTPException(status_code=400, detail="Empty request body")
-        
-        message = json.loads(body.decode('utf-8'))
-        print(f"SNS webhook parsed message type: {message.get('Type')}")
-        
-        # For SubscriptionConfirmation and UnsubscribeConfirmation, we don't validate signature
-        # AWS will send a URL to confirm
-        if message.get('Type') in ['SubscriptionConfirmation', 'UnsubscribeConfirmation']:
-            return message
-        
-        # Get certificate URL and download certificate
-        cert_url = message.get('SigningCertURL')
-        if not cert_url:
-            raise HTTPException(status_code=400, detail="Missing SigningCertURL")
-        
-        # Verify certificate URL is from AWS
-        parsed_url = urlparse(cert_url)
-        if not parsed_url.hostname.endswith('.amazonaws.com'):
-            raise HTTPException(status_code=400, detail="Invalid certificate URL")
-        
-        # Download certificate
-        async with httpx.AsyncClient() as client:
-            cert_response = await client.get(cert_url)
-            cert_response.raise_for_status()
-            cert_pem = cert_response.content
-        
-        # Load certificate and extract public key
-        cert = x509.load_pem_x509_certificate(cert_pem, default_backend())
-        public_key = cert.public_key()
-        
-        # Build string to sign
-        if message.get('Type') == 'Notification':
-            string_to_sign = (
-                f"Message\n{message['Message']}\n"
-                f"MessageId\n{message['MessageId']}\n"
-            )
-            if 'Subject' in message:
-                string_to_sign += f"Subject\n{message['Subject']}\n"
-            string_to_sign += (
-                f"Timestamp\n{message['Timestamp']}\n"
-                f"TopicArn\n{message['TopicArn']}\n"
-                f"Type\n{message['Type']}\n"
-            )
-        else:
-            string_to_sign = (
-                f"Message\n{message['Message']}\n"
-                f"MessageId\n{message['MessageId']}\n"
-                f"SubscribeURL\n{message['SubscribeURL']}\n"
-                f"Timestamp\n{message['Timestamp']}\n"
-                f"Token\n{message['Token']}\n"
-                f"TopicArn\n{message['TopicArn']}\n"
-                f"Type\n{message['Type']}\n"
-            )
-        
-        # Verify signature
-        signature = base64.b64decode(message['Signature'])
+# SNS Webhook for Bounce Handling (conditionally enabled)
+if ENABLE_SNS_WEBHOOKS:
+    async def verify_sns_signature(request: Request) -> dict:
+        """Verify SNS message signature"""
         try:
-            public_key.verify(
-                signature,
-                string_to_sign.encode('utf-8'),
-                padding.PKCS1v15(),
-                hashes.SHA1()
-            )
-        except Exception as e:
-            raise HTTPException(status_code=400, detail=f"Invalid signature: {str(e)}")
-        
-        return message
-        
-    except json.JSONDecodeError:
-        raise HTTPException(status_code=400, detail="Invalid JSON")
-    except Exception as e:
-        raise HTTPException(status_code=400, detail=f"Signature verification failed: {str(e)}")
-
-async def process_bounce(bounce_data: dict):
-    """Process bounce notification and update database"""
-    try:
-        bounce_type = bounce_data.get('bounceType')  # Permanent, Transient, Undetermined
-        bounce_subtype = bounce_data.get('bounceSubType', '')
-        timestamp_str = bounce_data.get('timestamp')
-        feedback_id = bounce_data.get('feedbackId', '')
-        
-        # Convert ISO 8601 timestamp to MySQL datetime format
-        # SES sends: '2025-10-13T16:22:40.359Z'
-        # MySQL needs: '2025-10-13 16:22:40'
-        from datetime import datetime as dt
-        timestamp = dt.fromisoformat(timestamp_str.replace('Z', '+00:00')).strftime('%Y-%m-%d %H:%M:%S')
-        
-        bounced_recipients = bounce_data.get('bouncedRecipients', [])
-        
-        with get_db() as conn:
-            cursor = conn.cursor(dictionary=True)
+            body = await request.body()
+            print(f"SNS webhook received body: {body}")
+            print(f"SNS webhook body length: {len(body)}")
+            print(f"SNS webhook headers: {dict(request.headers)}")
             
-            for recipient in bounced_recipients:
-                email = recipient.get('emailAddress')
-                diagnostic_code = recipient.get('diagnosticCode', '')
+            if not body:
+                print("ERROR: Empty body received")
+                raise HTTPException(status_code=400, detail="Empty request body")
+            
+            message = json.loads(body.decode('utf-8'))
+            print(f"SNS webhook parsed message type: {message.get('Type')}")
+            
+            # For SubscriptionConfirmation and UnsubscribeConfirmation, we don't validate signature
+            # AWS will send a URL to confirm
+            if message.get('Type') in ['SubscriptionConfirmation', 'UnsubscribeConfirmation']:
+                return message
+            
+            # Get certificate URL and download certificate
+            cert_url = message.get('SigningCertURL')
+            if not cert_url:
+                raise HTTPException(status_code=400, detail="Missing SigningCertURL")
+            
+            # Verify certificate URL is from AWS
+            parsed_url = urlparse(cert_url)
+            if not parsed_url.hostname.endswith('.amazonaws.com'):
+                raise HTTPException(status_code=400, detail="Invalid certificate URL")
+            
+            # Download certificate
+            async with httpx.AsyncClient() as client:
+                cert_response = await client.get(cert_url)
+                cert_response.raise_for_status()
+                cert_pem = cert_response.content
+            
+            # Load certificate and extract public key
+            cert = x509.load_pem_x509_certificate(cert_pem, default_backend())
+            public_key = cert.public_key()
+            
+            # Build string to sign
+            if message.get('Type') == 'Notification':
+                string_to_sign = (
+                    f"Message\n{message['Message']}\n"
+                    f"MessageId\n{message['MessageId']}\n"
+                )
+                if 'Subject' in message:
+                    string_to_sign += f"Subject\n{message['Subject']}\n"
+                string_to_sign += (
+                    f"Timestamp\n{message['Timestamp']}\n"
+                    f"TopicArn\n{message['TopicArn']}\n"
+                    f"Type\n{message['Type']}\n"
+                )
+            else:
+                string_to_sign = (
+                    f"Message\n{message['Message']}\n"
+                    f"MessageId\n{message['MessageId']}\n"
+                    f"SubscribeURL\n{message['SubscribeURL']}\n"
+                    f"Timestamp\n{message['Timestamp']}\n"
+                    f"Token\n{message['Token']}\n"
+                    f"TopicArn\n{message['TopicArn']}\n"
+                    f"Type\n{message['Type']}\n"
+                )
+            
+            # Verify signature
+            signature = base64.b64decode(message['Signature'])
+            try:
+                public_key.verify(
+                    signature,
+                    string_to_sign.encode('utf-8'),
+                    padding.PKCS1v15(),
+                    hashes.SHA1()
+                )
+            except Exception as e:
+                raise HTTPException(status_code=400, detail=f"Invalid signature: {str(e)}")
+            
+            return message
+            
+        except json.JSONDecodeError:
+            raise HTTPException(status_code=400, detail="Invalid JSON")
+        except Exception as e:
+            raise HTTPException(status_code=400, detail=f"Signature verification failed: {str(e)}")
+
+    async def process_bounce(bounce_data: dict):
+        """Process bounce notification and update database"""
+        try:
+            bounce_type = bounce_data.get('bounceType')  # Permanent, Transient, Undetermined
+            bounce_subtype = bounce_data.get('bounceSubType', '')
+            timestamp_str = bounce_data.get('timestamp')
+            feedback_id = bounce_data.get('feedbackId', '')
+            
+            # Convert ISO 8601 timestamp to MySQL datetime format
+            # SES sends: '2025-10-13T16:22:40.359Z'
+            # MySQL needs: '2025-10-13 16:22:40'
+            from datetime import datetime as dt
+            timestamp = dt.fromisoformat(timestamp_str.replace('Z', '+00:00')).strftime('%Y-%m-%d %H:%M:%S')
+            
+            bounced_recipients = bounce_data.get('bouncedRecipients', [])
+            
+            with get_db() as conn:
+                cursor = conn.cursor(dictionary=True)
                 
-                if not email:
-                    continue
-                
-                # Find member by email
-                cursor.execute("SELECT member_id FROM members WHERE email = %s", (email,))
-                member = cursor.fetchone()
-                member_id = member['member_id'] if member else None
-                
-                # Log the bounce
-                cursor.execute("""
-                    INSERT INTO bounce_logs 
-                    (member_id, email, bounce_type, bounce_subtype, diagnostic_code, timestamp, feedback_id)
-                    VALUES (%s, %s, %s, %s, %s, %s, %s)
-                """, (member_id, email, bounce_type, bounce_subtype, diagnostic_code, timestamp, feedback_id))
-                
-                # Update member bounce status
-                if member_id:
-                    # Determine bounce status
-                    if bounce_type == 'Permanent':
-                        new_status = 'hard_bounce'
-                        # Deactivate member with hard bounce
-                        cursor.execute("""
-                            UPDATE members 
-                            SET bounce_count = bounce_count + 1,
-                                last_bounce_at = %s,
-                                bounce_status = %s,
-                                active = 0
-                            WHERE member_id = %s
-                        """, (timestamp, new_status, member_id))
-                    elif bounce_type == 'Transient':
-                        # Check current bounce count
-                        cursor.execute("SELECT bounce_count, bounce_status FROM members WHERE member_id = %s", (member_id,))
-                        current = cursor.fetchone()
-                        
-                        # If already hard bounced, don't change status
-                        if current and current['bounce_status'] != 'hard_bounce':
-                            new_count = current['bounce_count'] + 1
-                            # After 3 soft bounces, mark as soft_bounce status
-                            new_status = 'soft_bounce' if new_count >= 3 else 'clean'
-                            
+                for recipient in bounced_recipients:
+                    email = recipient.get('emailAddress')
+                    diagnostic_code = recipient.get('diagnosticCode', '')
+                    
+                    if not email:
+                        continue
+                    
+                    # Find member by email
+                    cursor.execute("SELECT member_id FROM members WHERE email = %s", (email,))
+                    member = cursor.fetchone()
+                    member_id = member['member_id'] if member else None
+                    
+                    # Log the bounce
+                    cursor.execute("""
+                        INSERT INTO bounce_logs 
+                        (member_id, email, bounce_type, bounce_subtype, diagnostic_code, timestamp, feedback_id)
+                        VALUES (%s, %s, %s, %s, %s, %s, %s)
+                    """, (member_id, email, bounce_type, bounce_subtype, diagnostic_code, timestamp, feedback_id))
+                    
+                    # Update member bounce status
+                    if member_id:
+                        # Determine bounce status
+                        if bounce_type == 'Permanent':
+                            new_status = 'hard_bounce'
+                            # Deactivate member with hard bounce
                             cursor.execute("""
                                 UPDATE members 
-                                SET bounce_count = %s,
+                                SET bounce_count = bounce_count + 1,
                                     last_bounce_at = %s,
-                                    bounce_status = %s
+                                    bounce_status = %s,
+                                    active = 0
                                 WHERE member_id = %s
-                            """, (new_count, timestamp, new_status, member_id))
-                    else:  # Undetermined
-                        cursor.execute("""
-                            UPDATE members 
-                            SET bounce_count = bounce_count + 1,
-                                last_bounce_at = %s
-                            WHERE member_id = %s
-                        """, (timestamp, member_id))
+                            """, (timestamp, new_status, member_id))
+                        elif bounce_type == 'Transient':
+                            # Check current bounce count
+                            cursor.execute("SELECT bounce_count, bounce_status FROM members WHERE member_id = %s", (member_id,))
+                            current = cursor.fetchone()
+                            
+                            # If already hard bounced, don't change status
+                            if current and current['bounce_status'] != 'hard_bounce':
+                                new_count = current['bounce_count'] + 1
+                                # After 3 soft bounces, mark as soft_bounce status
+                                new_status = 'soft_bounce' if new_count >= 3 else 'clean'
+                                
+                                cursor.execute("""
+                                    UPDATE members 
+                                    SET bounce_count = %s,
+                                        last_bounce_at = %s,
+                                        bounce_status = %s
+                                    WHERE member_id = %s
+                                """, (new_count, timestamp, new_status, member_id))
+                        else:  # Undetermined
+                            cursor.execute("""
+                                UPDATE members 
+                                SET bounce_count = bounce_count + 1,
+                                    last_bounce_at = %s
+                                WHERE member_id = %s
+                            """, (timestamp, member_id))
+                
+                conn.commit()
+                cursor.close()
+                
+        except Exception as e:
+            print(f"✗ Error processing bounce: {str(e)}")
+            print(f"Error type: {type(e).__name__}")
+            print(f"Bounce data: {bounce_data}")
+            import traceback
+            traceback.print_exc()
+            raise
+
+    @app.post("/webhooks/sns", response_class=PlainTextResponse)
+    async def sns_webhook(request: Request):
+        """Handle SNS notifications for bounces and complaints"""
+        try:
+            print(f"=== SNS Webhook Request ===")
+            print(f"Headers: {dict(request.headers)}")
+            print(f"Content-Type: {request.headers.get('content-type')}")
+            print(f"User-Agent: {request.headers.get('user-agent')}")
             
-            conn.commit()
+            # Verify SNS signature
+            message = await verify_sns_signature(request)
+            
+            print(f"Message Type: {message.get('Type')}")
+            print(f"Message Keys: {list(message.keys())}")
+            
+            message_type = message.get('Type')
+            
+            # Handle subscription confirmation
+            if message_type == 'SubscriptionConfirmation':
+                subscribe_url = message.get('SubscribeURL')
+                print(f"Subscription confirmation received, URL: {subscribe_url}")
+                if subscribe_url:
+                    # Confirm subscription
+                    async with httpx.AsyncClient() as client:
+                        response = await client.get(subscribe_url)
+                        print(f"Subscription confirmation response: {response.status_code}")
+                    return "Subscription confirmed"
+            
+            # Handle notification
+            elif message_type == 'Notification':
+                # Parse the message
+                inner_message = message.get('Message', '{}')
+                print(f"Inner message (first 500 chars): {inner_message[:500]}")
+                notification = json.loads(inner_message)
+                
+                # SES can send either 'notificationType' or 'eventType' depending on configuration
+                notification_type = notification.get('notificationType') or notification.get('eventType')
+                print(f"Notification type: {notification_type}")
+                
+                if notification_type == 'Bounce':
+                    bounce = notification.get('bounce', {})
+                    print(f"\n✓ Processing Bounce")
+                    print(f"  Bounce Type: {bounce.get('bounceType')}")
+                    print(f"  Recipients: {[r.get('emailAddress') for r in bounce.get('bouncedRecipients', [])]}")
+                    await process_bounce(bounce)
+                    print(f"  ✓ Bounce processed successfully")
+                    return "Bounce processed"
+                
+                elif notification_type == 'Complaint':
+                    # We could also track complaints similarly to bounces
+                    print(f"\n✓ Complaint received")
+                    return "Complaint received"
+                
+            print(f"=== End SNS Webhook Request ===")
+            return "OK"
+            
+        except HTTPException:
+            raise
+        except Exception as e:
+            print(f"SNS webhook error: {str(e)}")
+            import traceback
+            traceback.print_exc()
+            raise HTTPException(status_code=500, detail=str(e))
+
+else:
+    # Provide stub functions when SNS webhooks are disabled
+    print("SNS webhooks disabled - bounce handling via email only")
+
+# Bounce management endpoints (conditionally enabled)
+if ENABLE_BOUNCE_HANDLING:
+    class BounceLog(BaseModel):
+        bounce_id: int
+        email: str
+        bounce_type: str
+        bounce_subtype: Optional[str] = None
+        diagnostic_code: Optional[str] = None
+        timestamp: datetime
+        feedback_id: Optional[str] = None
+        created_at: datetime
+
+    class MemberWithBounces(BaseModel):
+        member_id: int
+        name: str
+        email: str
+        active: bool
+        bounce_count: int
+        last_bounce_at: Optional[datetime] = None
+        bounce_status: str
+
+    @app.get("/members/{member_id}/bounces", response_model=List[BounceLog])
+    async def get_member_bounces(member_id: int, current_user: CurrentUser = require_read_access()):
+        """Get bounce history for a member"""
+        with get_db() as conn:
+            cursor = conn.cursor(dictionary=True)
+            cursor.execute("""
+                SELECT bounce_id, email, bounce_type, bounce_subtype, diagnostic_code, 
+                       timestamp, feedback_id, created_at
+                FROM bounce_logs
+                WHERE member_id = %s
+                ORDER BY timestamp DESC
+            """, (member_id,))
+            bounces = cursor.fetchall()
             cursor.close()
-            
-    except Exception as e:
-        print(f"✗ Error processing bounce: {str(e)}")
-        print(f"Error type: {type(e).__name__}")
-        print(f"Bounce data: {bounce_data}")
-        import traceback
-        traceback.print_exc()
-        raise
+            return bounces
 
-@app.post("/webhooks/sns", response_class=PlainTextResponse)
-async def sns_webhook(request: Request):
-    """Handle SNS notifications for bounces and complaints"""
-    try:
-        print(f"=== SNS Webhook Request ===")
-        print(f"Headers: {dict(request.headers)}")
-        print(f"Content-Type: {request.headers.get('content-type')}")
-        print(f"User-Agent: {request.headers.get('user-agent')}")
-        
-        # Verify SNS signature
-        message = await verify_sns_signature(request)
-        
-        print(f"Message Type: {message.get('Type')}")
-        print(f"Message Keys: {list(message.keys())}")
-        
-        message_type = message.get('Type')
-        
-        # Handle subscription confirmation
-        if message_type == 'SubscriptionConfirmation':
-            subscribe_url = message.get('SubscribeURL')
-            print(f"Subscription confirmation received, URL: {subscribe_url}")
-            if subscribe_url:
-                # Confirm subscription
-                async with httpx.AsyncClient() as client:
-                    response = await client.get(subscribe_url)
-                    print(f"Subscription confirmation response: {response.status_code}")
-                return "Subscription confirmed"
-        
-        # Handle notification
-        elif message_type == 'Notification':
-            # Parse the message
-            inner_message = message.get('Message', '{}')
-            print(f"Inner message (first 500 chars): {inner_message[:500]}")
-            notification = json.loads(inner_message)
+    @app.patch("/members/{member_id}/bounce-status")
+    async def reset_bounce_status(member_id: int, current_user: CurrentUser = require_write_access()):
+        """Reset bounce status for a member (e.g., after email address is corrected)"""
+        with get_db() as conn:
+            cursor = conn.cursor()
+            cursor.execute("""
+                UPDATE members 
+                SET bounce_count = 0,
+                    last_bounce_at = NULL,
+                    bounce_status = 'clean'
+                WHERE member_id = %s
+            """, (member_id,))
+            conn.commit()
             
-            # SES can send either 'notificationType' or 'eventType' depending on configuration
-            notification_type = notification.get('notificationType') or notification.get('eventType')
-            print(f"Notification type: {notification_type}")
+            if cursor.rowcount == 0:
+                raise HTTPException(status_code=404, detail="Member not found")
             
-            if notification_type == 'Bounce':
-                bounce = notification.get('bounce', {})
-                print(f"\n✓ Processing Bounce")
-                print(f"  Bounce Type: {bounce.get('bounceType')}")
-                print(f"  Recipients: {[r.get('emailAddress') for r in bounce.get('bouncedRecipients', [])]}")
-                await process_bounce(bounce)
-                print(f"  ✓ Bounce processed successfully")
-                return "Bounce processed"
-            
-            elif notification_type == 'Complaint':
-                # We could also track complaints similarly to bounces
-                print(f"\n✓ Complaint received")
-                return "Complaint received"
-            
-        print(f"=== End SNS Webhook Request ===")
-        return "OK"
-        
-    except HTTPException:
-        raise
-    except Exception as e:
-        print(f"SNS webhook error: {str(e)}")
-        import traceback
-        traceback.print_exc()
-        raise HTTPException(status_code=500, detail=str(e))
+            cursor.close()
+            return {"message": "Bounce status reset successfully"}
 
-# Bounce management endpoints
-class BounceLog(BaseModel):
-    bounce_id: int
-    email: str
-    bounce_type: str
-    bounce_subtype: Optional[str] = None
-    diagnostic_code: Optional[str] = None
-    timestamp: datetime
-    feedback_id: Optional[str] = None
-    created_at: datetime
+else:
+    # When bounce handling is disabled, provide stub endpoints that return appropriate responses
+    @app.get("/members/{member_id}/bounces")
+    async def get_member_bounces_disabled(member_id: int, current_user: CurrentUser = require_read_access()):
+        """Bounce history disabled - returns empty list"""
+        return []
 
-class MemberWithBounces(BaseModel):
-    member_id: int
-    name: str
-    email: str
-    active: bool
-    bounce_count: int
-    last_bounce_at: Optional[datetime] = None
-    bounce_status: str
-
-@app.get("/members/{member_id}/bounces", response_model=List[BounceLog])
-async def get_member_bounces(member_id: int, current_user: CurrentUser = require_read_access()):
-    """Get bounce history for a member"""
-    with get_db() as conn:
-        cursor = conn.cursor(dictionary=True)
-        cursor.execute("""
-            SELECT bounce_id, email, bounce_type, bounce_subtype, diagnostic_code, 
-                   timestamp, feedback_id, created_at
-            FROM bounce_logs
-            WHERE member_id = %s
-            ORDER BY timestamp DESC
-        """, (member_id,))
-        bounces = cursor.fetchall()
-        cursor.close()
-        return bounces
-
-@app.patch("/members/{member_id}/bounce-status")
-async def reset_bounce_status(member_id: int, current_user: CurrentUser = require_write_access()):
-    """Reset bounce status for a member (e.g., after email address is corrected)"""
-    with get_db() as conn:
-        cursor = conn.cursor()
-        cursor.execute("""
-            UPDATE members 
-            SET bounce_count = 0,
-                last_bounce_at = NULL,
-                bounce_status = 'clean'
-            WHERE member_id = %s
-        """, (member_id,))
-        conn.commit()
-        
-        if cursor.rowcount == 0:
-            raise HTTPException(status_code=404, detail="Member not found")
-        
-        cursor.close()
-        return {"message": "Bounce status reset successfully"}
+    @app.patch("/members/{member_id}/bounce-status")
+    async def reset_bounce_status_disabled(member_id: int, current_user: CurrentUser = require_write_access()):
+        """Bounce status reset disabled"""
+        raise HTTPException(status_code=501, detail="Bounce handling is disabled")
 
 if __name__ == "__main__":
     import uvicorn

web/static/js/api.js

@@ -105,6 +105,10 @@ class APIClient {
         return this.request('/health');
     }
 
+    async getConfig() {
+        return this.request('/config');
+    }
+
     async testAuth() {
         return this.request('/');
     }

web/static/js/app.js

@@ -352,12 +352,15 @@ class MailingListApp {
         try {
             uiManager.setLoading(true);
             
-            // Load lists and members in parallel
-            const [lists, members] = await Promise.all([
+            // Load configuration, lists and members in parallel
+            const [config, lists, members] = await Promise.all([
+                apiClient.getConfig(),
                 apiClient.getLists(),
                 apiClient.getMembers()
             ]);
             
+            this.config = config;
+            
             this.lists = lists;
             this.members = members;
             
@@ -531,7 +534,7 @@ class MailingListApp {
             row.innerHTML = `
                 <td>
                     <div class="font-medium">${uiManager.escapeHtml(member.name)}</div>
-                    ${member.bounce_count > 0 ? `<div class="text-xs text-muted" style="margin-top: 2px;"></div>` : ''}
+                    ${this.config?.bounce_handling_enabled && member.bounce_count > 0 ? `<div class="text-xs text-muted" style="margin-top: 2px;"></div>` : ''}
                 </td>
                 <td>
                     <a href="mailto:${member.email}" style="color: var(--primary-color)">
@@ -552,8 +555,8 @@ class MailingListApp {
                 </td>
             `;
             
-            // Add bounce badge if member has bounces
-            if (member.bounce_count > 0) {
+            // Add bounce badge if member has bounces (only if bounce handling is enabled)
+            if (this.config?.bounce_handling_enabled && member.bounce_count > 0) {
                 const bounceInfoDiv = row.cells[0].querySelector('.text-xs');
                 const bounceBadge = uiManager.createBounceStatusBadge(member.bounce_status, member.bounce_count);
                 if (bounceBadge) {
@@ -577,8 +580,8 @@ class MailingListApp {
                 uiManager.showMemberSubscriptionsModal(member);
             });
 
-            // Create Bounces button (show if member has any bounces or for admins/operators)
-            if (member.bounce_count > 0 || hasWriteAccess) {
+            // Create Bounces button (show if bounce handling is enabled and member has bounces or for admins/operators)
+            if (this.config?.bounce_handling_enabled && (member.bounce_count > 0 || hasWriteAccess)) {
                 const bouncesBtn = document.createElement('button');
                 bouncesBtn.className = `btn btn-sm ${member.bounce_count > 0 ? 'btn-warning' : 'btn-secondary'}`;
                 bouncesBtn.innerHTML = `<i class="fas fa-exclamation-triangle"></i> Bounces${member.bounce_count > 0 ? ` (${member.bounce_count})` : ''}`;
@@ -852,8 +855,8 @@ class MailingListApp {
             statusBadge.className = `status-badge ${member.active ? 'active' : 'inactive'}`;
             statusBadge.innerHTML = `<i class="fas fa-${member.active ? 'check' : 'times'}"></i> ${member.active ? 'Active' : 'Inactive'}`;
             
-            // Add bounce status if exists
-            if (member.bounce_status && member.bounce_status !== 'clean') {
+            // Add bounce status if exists and bounce handling is enabled
+            if (this.config?.bounce_handling_enabled && member.bounce_status && member.bounce_status !== 'clean') {
                 const bounceIndicator = document.createElement('span');
                 bounceIndicator.className = `bounce-badge bounce-${member.bounce_status === 'hard_bounce' ? 'hard' : 'soft'}`;
                 bounceIndicator.innerHTML = `<i class="fas fa-exclamation-triangle"></i> Bounces`;
@@ -868,8 +871,8 @@ class MailingListApp {
             const actionsCell = row.insertCell();
             actionsCell.className = 'action-buttons';
             
-            // Bounces button (if member has bounce data)
-            if (member.bounce_count > 0) {
+            // Bounces button (if bounce handling is enabled and member has bounce data)
+            if (this.config?.bounce_handling_enabled && member.bounce_count > 0) {
                 const bouncesBtn = uiManager.createActionButton('Bounces', 'exclamation-triangle', 'btn-warning', () => {
                     uiManager.showBounceHistory(member);
                 });