Draft personalized welcome emails for new signups with Twain, Gmail, and Slack

by Mohamed Yahya Chahin ✓ · 41 views · created 2026-07-14 · Lead Nurturing, Multimodal AI

What this workflow does

This workflow has 28 nodes and runs when an HTTP POST request hits its webhook URL (plus 2 other triggers). Along the way it connects Slack, Gmail, Google BigQuery and Google Cloud Firestore. It also calls app.findymail.com, public.api.twain.ai and api.heyreach.io over HTTP.

How it runs

Trigger: When an HTTP POST request hits its webhook URL (plus 2 other triggers).

1. Normalize Signup (Edit Fields (Set)): sets 10 fields: uid, email, displayName…
2. BigQuery: New signups (Google BigQuery): uses Google BigQuery
3. Firestore: New customers (Google Cloud Firestore): query
4. Channel Settings (Edit Fields (Set)): sets 4 fields: email_steps, linkedin_steps, heyreach_campaign_id…
5. Dedupe New Signups (Remove Duplicates): removes duplicate items
6. Needs LinkedIn Lookup? (If): checks a condition and branches into true / false
7. LinkedIn Lookup — Findymail (HTTP Request): calls app.findymail.com (POST)
8. Resolved Contact (Merge): merges the data from its input branches
9. Apply Resolved LinkedIn (Code): runs custom JavaScript code
10. Has usable contact? (If): checks a condition and branches into true / false

…plus 15 more steps. See the full node list below.

Services it uses

SlackGmailGoogle BigQueryGoogle Cloud Firestore

HTTP calls to: app.findymail.com, public.api.twain.ai, api.heyreach.io, api.apollo.io

Before you upgrade to n8n 3.0

Nodes used (12)

• Webhookn8n-nodes-base.webhook
• Edit Fields (Set)n8n-nodes-base.set
• Remove Duplicatesn8n-nodes-base.removeDuplicates
• Ifn8n-nodes-base.if
• Slackn8n-nodes-base.slack
• HTTP Requestn8n-nodes-base.httpRequest
• Coden8n-nodes-base.code
• Gmailn8n-nodes-base.gmail
• Schedule Triggern8n-nodes-base.scheduleTrigger
• Google BigQueryn8n-nodes-base.googleBigQuery
• Google Cloud Firestoren8n-nodes-base.googleFirebaseCloudFirestore
• Mergen8n-nodes-base.merge

From the author

Quick overview This workflow receives new signup events, enriches each contact with Twain (and optionally a LinkedIn lookup), drafts a personalized welcome email in Gmail, and posts review-ready previews to Slack, with optional LinkedIn-step handoff to…

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