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Automated Daily Email Analysis & Summary with GPT-4o and Gmail

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Created by: Zach @Ajenta || ajenta

Zach @Ajenta

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Last update 17 hours ago

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Daily Email Pulse Summary:

This agent summarizes a user's daily emails into a clean, actionable summary. It uses OpenAI to analyze content and sends a formatted "Daily Pulse" email at the end of each day.

Main use cases:

Keep track of open loops and next steps across all email conversations

Identify high-potential leads and flag conversations going nowhere

Eliminate the need to manually review your inbox at day’s end

Build a smart summary layer using AI without hallucination or noise

How it works

This workflow can be divided into eight core nodes, each serving a distinct purpose in helping a user stay on top of their day. The result is a curated, AI-generated summary delivered to your inbox — crafted from real message content, not guesswork.

  1. Schedule Trigger (Trigger Node – Runs Daily at Set Time)
  • Kicks off the workflow at a specific time each day (e.g. 6:00 PM).
  • Ensures you receive your Daily Pulse consistently, without needing to run it manually.
  1. Date Transformer (Function Node – Define Today & Tomorrow Range)
  • Uses JavaScript to calculate the current day’s date range:
    • today: Start of day (00:00:00)
    • tomorrow: Start of next day (used as a cutoff)
  • This ensures only emails from today are analyzed, keeping the summary focused and current.
  1. Get All Messages (Gmail Node – Fetch Filtered Emails)
  • Pulls in all Gmail messages with internalDate between today and tomorrow.
  • Outputs structured data: from, subject, and body text of each email.
  • This forms the raw data for the daily business pulse.
  1. Aggregator (Function or Item Lists Node – Combine Message Fields)
  • Aggregates each message into a readable format:
From: [email protected]  
Subject: Demo Follow-up  
Body: Let’s schedule a time this week...
  • All messages are stitched together into a single combinedText string for analysis.
  • This gives the AI model full context for the day in one unified document.
  1. Email Cleanup (Function Node – Remove Noise & Normalize Text)
  • Cleans the combinedText blob to remove:
    • HTML tags
    • Marketing footers (e.g., unsubscribe links)
    • Redundant whitespace or formatting artifacts
  • Ensures GPT gets clean, relevant message content with no distractions.
  1. Agent (OpenAI Node – Generate Structured Summary)

  • Uses a System Prompt to define its role as an AI Chief of Staff.

  • Uses a User Prompt that instructs it to categorize messages into sections:

    • 📝 Open Loops / Pending Follow-Up
    • 🚀 Next Steps You’ve Committed To
    • 🧲 Leads Worth Following Up On
    • 🛑 Conversations That Aren’t Leading Anywhere
    • 🧠 Strategy Notes
    • ✅ Top 3 Tasks for Tomorrow

  • Built-in guardrails ensure the model only uses real content (no hallucination).

  • Sections with no relevant data are omitted to keep it concise.

  1. HTML Formatter (Function Node – Wrap Markdown in Email-Ready HTML)
  • Wraps the GPT-generated markdown summary in a simple <html><body><pre> structure.
  • Applies white-space: pre-wrap to preserve formatting and spacing.
  • The result is a clean, readable email that renders well across all inboxes (especially Gmail).
  1. Email Send (Email Node – Deliver the Final Pulse)
  • Sends the formatted summary to your email inbox.
  • Subject: Your Daily Business Pulse – {{today}}
  • HTML body: Uses the formatted output from the previous step.
  • Final output: a well-organized, scannable summary of the day’s communication — focused on what matters.

Why It Works

  • Automates the end-of-day review ritual without effort
  • Prioritizes follow-ups, action items, and time-sensitive leads
  • Filters out noise and low-value conversations
  • Leverages GPT without risk of hallucination or irrelevant output
  • Delivers clarity, helping you focus on tomorrow’s most important tasks```language