Paul This workflow corresponds to n8n.io template #6402 — we link there as the canonical source.
This workflow follows the Agent → OpenAI Chat recipe pattern — see all workflows that pair these two integrations.
The workflow JSON
Copy or download the full n8n JSON below. Paste it into a new n8n workflow, add your credentials, activate. Full import guide →
{
"id": "71rsSS872JvzpgRw",
"meta": {
"templateCredsSetupCompleted": true
},
"name": "GPT-4 Powered Cold Mail Workflow with Fully Tailored 3-Email Follow-Ups",
"tags": [
{
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"name": "Building...",
"createdAt": "2025-06-18T21:57:50.272Z",
"updatedAt": "2025-06-18T21:57:50.272Z"
},
{
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}
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"Supabase2": {
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},
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},
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},
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},
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},
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},
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},
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},
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},
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},
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]
},
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],
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]
]
},
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},
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},
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},
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},
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},
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]
},
"Evualute when the mail was sent": {
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[
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},
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}
}
Pro
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How this works
This workflow generates and sends personalised cold email sequences by pulling contact data from Supabase, crafting context-aware messages with GPT-4, and delivering them through Mailgun. It suits sales teams and founders who need to run regular outreach without manual drafting each time. The core step is the AI agent that analyses recipient details and previous replies before deciding the next message tone and content.
Use it for steady lead-nurture campaigns where contacts are already stored in Supabase and replies can be tracked; avoid it for one-off blasts or when strict compliance rules require human approval on every email. A common variation swaps the cron trigger for a webhook so sequences start immediately on new sign-ups.
About this workflow
This workflow contains community nodes that are only compatible with the self-hosted version of n8n.
Source: https://n8n.io/workflows/6402/ — original creator credit. Request a take-down →
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