Step 2: Connect Gmail Actions

Apply labels and draft replies based on category outcomes. Since there are multiple Gmail action nodes, connect the same Gmail account across all of them.

1. In Apply Complaint Tag, set Operation to addLabels, set Message ID to {{ $('Incoming Gmail Monitor').item.json.id }}, and set Label IDs to your complaint label ID.
2. In Apply Info Tag, set Operation to addLabels, set Message ID to {{ $('Incoming Gmail Monitor').item.json.id }}, and set Label IDs to your info label ID.
3. In Apply Other Tag, set Operation to addLabels, set Message ID to {{ $('Incoming Gmail Monitor').item.json.id }}, and confirm Label IDs is UNREAD or replace it with your label ID.
4. In Tag Sales Thread and Tag Support Thread, set Resource to thread, Operation to addLabels, and Thread ID to {{ $('Incoming Gmail Monitor').item.json.threadId }}.
5. In Draft Sales Response and Draft Support Response, set Resource to draft, Subject to {{ $json.message.content.Subject }}, Message to {{ $json.message.content.Body }}, and set Send To to {{ $('Incoming Gmail Monitor').item.json.from.value[0].address }} with Thread ID set to {{ $('Incoming Gmail Monitor').item.json.threadId }}.
6. Credential Required: Connect your gmailOAuth2 credentials to all Gmail action nodes (7 nodes handle tagging and drafting).

Step 3: Set Up AI Classification and Replies

Use the classifier to route emails and the OpenAI nodes to draft support and sales replies.

1. Open Email Category Sorter and set Input Text to Subject: {{ $('Incoming Gmail Monitor').item.json.subject }} Text: {{ $('Incoming Gmail Monitor').item.json.text }}.
2. Confirm the category list in Email Category Sorter includes support, sales, complaints, and information, and keep Fallback as other.
3. Configure OpenAI Chat Engine with model gpt-4.1-mini and connect it as the language model for Email Category Sorter.
4. In Generate Support Reply and Generate Sales Reply, keep JSON Output enabled and confirm the message templates contain the sender name expression {{ $('Incoming Gmail Monitor').item.json.headers.from.replace(/^From:\s*/, '').match(/^(.*?)(?=\s*<)/)[1] }} and the email body {{ $('Incoming Gmail Monitor').item.json.text }}.
5. Credential Required: Connect your openAiApi credentials to OpenAI Chat Engine, Generate Support Reply, and Generate Sales Reply.

Step 4: Configure Routing, Decisions, and Parallel Actions

Map each category to set decisions, apply labels, and build output data for logging.

1. Verify Email Category Sorter routes to Generate Support Reply, Generate Sales Reply, Apply Complaint Tag, Apply Info Tag, and Apply Other Tag according to the classifier outputs.
2. Ensure Generate Support Reply outputs to both Tag Support Thread and Draft Support Response in parallel.
3. Ensure Generate Sales Reply outputs to both Draft Sales Response and Tag Sales Thread in parallel.
4. In Set Support Decision, set Decision to Sales, Subject_email to {{ $('Generate Support Reply').item.json.message.content.Subject }}, and Body_email to {{ $('Generate Support Reply').item.json.message.content.Body }}.
5. In Set Sales Decision, set Decision to Sales, Subject_email to {{ $('Generate Sales Reply').item.json.message.content.Subject }}, and Body_email to {{ $('Generate Sales Reply').item.json.message.content.Body }}.
6. In Set Complaint Decision, set Decision to Compliants; in Set Info Decision set Decision to Info; and in Set Other Decision set Decision to Other.
7. Leave Passthrough Holder A and Passthrough Holder B as no-op nodes to merge category outputs before logging.

Step 5: Configure Output Logging to Google Sheets

Append all outcomes to spreadsheet logs for auditing and analysis.

1. In Append Log Sheet, set Operation to append, select the target Document ID and Sheet Name, and map Decision to {{ $json.Decision }} and Original Email to Subject: {{ $('Incoming Gmail Monitor').item.json.headers.subject }} Body: {{ $('Incoming Gmail Monitor').item.json.text }}.
2. In Append Output Sheet, set Operation to append, select the same spreadsheet, and map Decision to {{ $json.Decision }}, Output Email to Subject: {{ $json.Subject_email }} Body: {{ $json.Body_email }}, and Original Email to Subject: {{ $('Incoming Gmail Monitor').item.json.headers.subject }} Body: {{ $('Incoming Gmail Monitor').item.json.text }}.
3. Credential Required: Connect your googleSheetsOAuth2Api credentials to Append Log Sheet and Append Output Sheet.

Step 6: Add Error Handling

Capture workflow failures and append them to an error log sheet for troubleshooting.

1. Use Error Capture Trigger as the error workflow entry point.
2. In Log Error Row, set Operation to append and map fields to {{ $now.format('dd-MM-yyyy hh:mm:ss') }}, {{ $workflow.id }}, {{ $execution.id }}, {{ $json.execution.error.message }}, and {{ $json.execution.lastNodeExecuted }}.
3. Credential Required: Connect your googleSheetsOAuth2Api credentials to Log Error Row.

Step 7: Test and Activate Your Workflow

Validate the end-to-end triage flow before turning it on for production.

1. Click Execute Workflow and send a test email to the monitored inbox that matches one category (e.g., sales or support).
2. Confirm labeling and drafting: check that tags are applied and drafts are created for sales or support categories.
3. Verify that Append Log Sheet and Append Output Sheet receive new rows with the expected values.
4. If a test fails, confirm Error Capture Trigger logs an entry in Log Error Row.
5. When results are correct, switch the workflow to Active for continuous email triage.