Implementing Delivery Receipt Tracking for Outbound SMS and Email Campaign Messages

How-To-Articles
1

Implementing Delivery Receipt Tracking for Outbound SMS and Email Campaign Messages

What This Guide Covers

This guide details the architectural implementation of robust delivery receipt tracking for outbound SMS and Email campaigns using Genesys Cloud CX Interaction Data APIs and Architect flows. You will configure the necessary permissions, construct the API payloads to retrieve message status, and build an Architect flow that handles asynchronous status updates to update your external CRM records accurately.

Prerequisites, Roles & Licensing

Licensing

  • Genesys Cloud CX 1 or higher: Required for basic outbound messaging capabilities.
  • CX 2 or higher: Required for advanced Interaction Data API features and comprehensive analytics retention.
  • CPaaS (Communications Platform as a Service) Add-on: Required if you are using Genesys Cloud as a CPaaS provider for external applications, though standard CX licenses cover internal campaign usage.
  • Email Campaigns Add-on: Required if sending bulk email campaigns via the native Email Campaigns feature.

Permissions

  • Interactions > Interaction > Read: Required to retrieve interaction records and their associated messages.
  • Interactions > Interaction > Update: Required if you need to patch interaction records with custom status data (though typically you read the status, you do not write it).
  • Campaigns > Campaign > Read: Required to view campaign configurations and statistics.
  • Admin > Admin > Read: Required to view system health and provider status.

OAuth Scopes

If you are building an external middleware service to poll for receipts:

  • interaction:read
  • campaign:read
  • user:read (for authentication context)

External Dependencies

  • SMS Provider Integration: Genesys Cloud integrates with providers like Twilio, MessageMedia, or Genesys Cloud CPaaS. The delivery receipt mechanism varies slightly by provider but is abstracted via the Interaction API.
  • Email Provider: For native email campaigns, Genesys uses its own infrastructure. For external SMTP relays, receipt tracking depends on the relay configuration (e.g., SendGrid, Amazon SES).
  • CRM System: The target system where delivery status will be persisted (e.g., Salesforce, Microsoft Dynamics).

The Implementation Deep-Dive

1. Understanding the Interaction Model for Delivery Receipts

In Genesys Cloud, an outbound SMS or Email is not a standalone entity; it is a message object nested within an interaction object. The interaction represents the entire conversation thread, while the message represents the individual transmission. Delivery receipts are not pushed to your CRM in real-time via webhook by default. Instead, they are stored in the Genesys Cloud database and must be retrieved via the Interaction Data API.

The critical field for delivery status is messageStatus within the messages array of the interaction record. For SMS, this maps to standard 3GPP SMS Status Report values. For Email, it maps to SMTP bounce codes and tracking pixel events.

Architectural Reasoning: We do not rely on real-time webhooks for delivery receipts in high-volume campaigns because webhook endpoints can become bottlenecks under load, leading to dropped events. By polling the Interaction API, we ensure data consistency and allow for retry logic in our middleware. This approach also allows us to correlate delivery status with other interaction metadata (like agent responses or customer replies) in a single API call.

The Trap: Assuming that messageStatus is immediately available upon sending. SMS delivery receipts are asynchronous. The provider sends the receipt to Genesys Cloud, which then updates the interaction record. This can take anywhere from 2 seconds to several minutes depending on the carrier. Polling too frequently (e.g., every second) will hit API rate limits. Polling too infrequently (e.g., every hour) provides stale data to your CRM. The sweet spot is a configurable interval, typically 30 to 60 seconds for high-priority messages, or batch processing every 5-10 minutes for bulk campaigns.

2. Configuring the Outbound Campaign for Receipt Tracking

Before retrieving receipts, you must ensure the outbound campaign is configured to generate trackable interactions.

SMS Campaign Configuration

  1. Navigate to Admin > Messaging > Outbound.
  2. Create a new SMS Campaign.
  3. Ensure the Message Template includes a unique identifier if you need to correlate the message with a specific business record (e.g., {{customer.id}}). This is not strictly required for delivery tracking but is essential for updating the correct CRM record.
  4. In the Advanced Settings, ensure Enable Delivery Reports is checked. This is the default, but explicitly verifying it prevents misconfigurations where reports are disabled for cost-saving measures.

Email Campaign Configuration

  1. Navigate to Engage > Email Campaigns.
  2. When creating a campaign, ensure Track Opens and Track Clicks are enabled.
  3. For delivery receipts, Genesys Cloud tracks bounces (hard and soft) natively. Ensure your From Address is properly authenticated (SPF, DKIM, DMARC) to prevent bounces before they leave the Genesys infrastructure.

3. Retrieving Delivery Receipts via the Interaction Data API

To retrieve the delivery status, you must query the Interaction Data API. You cannot query by message ID directly; you must query by interaction ID or by filtering interactions based on creation time and type.

Step 3.1: Identify the Interaction ID

If you are integrating with a CRM, you likely stored the interactionId when the message was sent. If you are polling for a batch, you will need to filter by time range.

API Endpoint:

GET /api/v2/interactions/search

Request Payload:

{
  "query": "type:SMS AND createdTime:[2023-10-01T00:00:00.000Z TO 2023-10-01T23:59:59.999Z]",
  "size": 100
}

Response Handling:
The response returns a list of interactions. Each interaction contains a messages array. You must iterate through this array to find the specific message you sent.

{
  "items": [
    {
      "id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
      "type": "SMS",
      "messages": [
        {
          "id": "msg123456",
          "direction": "OUTBOUND",
          "from": {
            "address": "+15551234567"
          },
          "to": [
            {
              "address": "+15559876543"
            }
          ],
          "text": "Hello, this is a test.",
          "status": "QUEUED" 
        }
      ]
    }
  ]
}

The Trap: Confusing the status field at the interaction level with the messageStatus field at the message level. The interaction status (QUEUED, IN_PROGRESS, COMPLETED) reflects the state of the entire conversation. The messageStatus (e.g., DELIVERED, FAILED, SENT) reflects the state of the individual transmission. Always check messages[*].status for delivery receipts.

Step 3.2: Polling for Status Updates

Since delivery is asynchronous, you must implement a polling mechanism.

Pseudo-Code for Polling Logic:

def check_delivery_status(interaction_id, max_retries=10, retry_interval=30):
    for i in range(max_retries):
        interaction = get_interaction(interaction_id)
        for message in interaction['messages']:
            if message['id'] == target_message_id:
                status = message['status']
                if status in ['DELIVERED', 'FAILED', 'REJECTED']:
                    return status
                elif status in ['SENT', 'QUEUED']:
                    time.sleep(retry_interval)
                    continue
        time.sleep(retry_interval)
    return 'UNKNOWN'

Architectural Reasoning: We use exponential backoff for retry intervals in production environments. If the first poll returns SENT, wait 10 seconds. If the next returns SENT, wait 20 seconds. This reduces load on the API during peak times.

4. Handling SMS Delivery Receipts

SMS delivery receipts are governed by the 3GPP TS 23.040 standard. Genesys Cloud maps these to simplified statuses.

Common SMS Statuses

  • SENT: The message has been handed off to the carrier. No delivery confirmation yet.
  • DELIVERED: The carrier confirms the message reached the handset.
  • FAILED: The carrier reports a failure. This could be due to an invalid number, network congestion, or a blocked number.
  • REJECTED: The message was rejected by Genesys Cloud or the provider before reaching the carrier (e.g., content violation, invalid format).
  • EXPIRED: The carrier did not deliver the message within the TTL (Time To Live) period.

The Trap: “Delivered” Does Not Mean “Read”

A common misconception is that DELIVERED means the customer read the message. It only means the message reached the device’s inbox. If the customer has Do Not Disturb enabled, or if the phone is off, the status may eventually become DELIVERED when the phone comes back online, or it may fail if the SIM card is removed. Do not trigger business logic (like “close the ticket”) based solely on DELIVERED status for SMS. Use it only for audit trails.

5. Handling Email Delivery Receipts

Email delivery tracking is more complex due to the lack of a universal standard for delivery receipts. Genesys Cloud relies on SMTP bounce messages and tracking pixels for opens.

Common Email Statuses

  • SENT: The message was handed off to the Genesys Cloud email infrastructure.
  • DELIVERED: The receiving mail server accepted the message. This is a “soft” confirmation. It does not guarantee the message landed in the inbox; it could be in the spam folder.
  • BOUNCED (Hard): The receiving mail server rejected the message permanently (e.g., invalid domain, user does not exist).
  • BOUNCED (Soft): The receiving mail server temporarily rejected the message (e.g., mailbox full, server down). Genesys Cloud will retry sending for a configured period (usually 3-5 days).
  • OPENED: The tracking pixel in the email was loaded by the recipient’s email client. This is not a delivery receipt but a read receipt.

The Trap: Privacy-First Email Clients

Modern email clients (Apple Mail, Gmail, Outlook) increasingly block tracking pixels by default to protect user privacy. This means the OPENED status is no longer reliable for tracking engagement. Rely on DELIVERED for audit purposes and BOUNCED for list hygiene. Do not build marketing logic around open rates without accounting for this degradation in accuracy.

6. Updating the CRM with Delivery Status

Once you have retrieved the delivery status, you must update the CRM record. This is typically done via an Architect flow or an external middleware service.

Using Genesys Cloud Architect

  1. Create a new Flow.
  2. Add a Trigger for Interaction Event > Interaction Updated.
  3. Filter the trigger to only process interactions of type SMS or EMAIL.
  4. Add a Decision node to check the messageStatus.
  5. Add a Call REST API node to update the CRM record with the new status.

Architect Expression for Message Status:

{{interaction.messages[0].status}}

The Trap: Race Conditions in Architect Flows. If an interaction has multiple messages, the interaction.messages[0] index may not refer to the most recent message. Always filter the messages array by id or timestamp to ensure you are processing the correct message.

Architect Expression for Filtering Messages:

{{interaction.messages.filter(m => m.id == "msg123456").first().status}}

7. Error Handling and Retry Logic

Delivery receipts can fail to arrive. Carriers may not send them, or the network may drop them.

Handling Missing Receipts

If a message remains in SENT status for more than 24 hours, it is likely that the delivery receipt was lost. In this case, you should treat the message as DELIVERED for audit purposes, but flag it as UNCERTAIN in your CRM.

Handling Failed Deliveries

If a message fails, you must decide on a retry strategy.

  • SMS: Retrying the same message to the same number may result in duplicate charges or customer annoyance. Only retry if the failure is due to a transient network issue (e.g., EXPIRED).
  • Email: For soft bounces, Genesys Cloud handles retries automatically. For hard bounces, suppress the number from future campaigns immediately.

The Trap: Suppressing Too Aggressively
Suppressing a number after a single soft bounce can lead to false positives. A temporary mailbox full error should not permanently blacklist a customer. Implement a suppression list that distinguishes between hard and soft bounces, and only permanently suppress on hard bounces or repeated soft bounces.

Validation, Edge Cases & Troubleshooting

Edge Case 1: The “Phantom” Delivery Receipt

The Failure Condition: The CRM records a message as DELIVERED, but the customer claims they never received it.
The Root Cause: The carrier reported delivery to the Genesys Cloud platform, but the message was blocked by the customer’s device-level spam filter or a network interceptor (e.g., enterprise firewall). The receipt is accurate from the carrier’s perspective but inaccurate from the user’s perspective.
The Solution: Acknowledge the limitation of carrier receipts. For critical messages (e.g., 2FA codes), implement a fallback mechanism (e.g., voice call) if the receipt is not confirmed within a specific timeframe, or rely on user confirmation (e.g., “Reply YES to confirm”).

Edge Case 2: Email Tracking Pixel Blocking

The Failure Condition: You expect OPENED status for marketing emails, but the rate drops to near zero after a software update to a major email client.
The Root Cause: Privacy features in Apple Mail (Mail Privacy Protection) and Gmail pre-fetch images, blocking or spoofing tracking pixel requests.
The Solution: Shift KPIs from “Open Rate” to “Click-Through Rate” (CTR) and “Conversion Rate.” These metrics are harder to spoof and provide more accurate engagement data. Update your reporting dashboards to reflect this change.

Edge Case 3: API Rate Limiting During Bulk Campaigns

The Failure Condition: Your polling middleware hits the Genesys Cloud API rate limit during a large outbound campaign, causing delayed CRM updates.
The Root Cause: Polling every interaction for every message in real-time exceeds the API throughput limits.
The Solution: Implement a batch processing model. Instead of polling for each message individually, query for interactions created in the last 5 minutes, process them, and then wait. Use the cursor parameter in the Interaction Data API to paginate through results efficiently.

Official References