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How to Automate Personalized LinkedIn Messages Using Lemlist + Sendspark

Automatically send dynamic video messages on LinkedIn using Lemlist campaigns and Sendspark workflows.

Dan Delauretis avatar
Written by Dan Delauretis
Updated this week

📘 Overview

This guide explains how to automate personalized LinkedIn outreach using Lemlist and Sendspark.
When a dynamic video is generated in Sendspark, it’s automatically pushed into Lemlist and sent as a LinkedIn follow-up message — with the GIF preview unfurled.

You end up with a fully autopilot workflow.

🧰 Before You Start

Make sure you already have:

  • A Lemlist campaign

  • Your Sendspark dynamic video campaign

  • Lemlist API key connected to Sendspark

  • A custom variable inside your Lemlist campaign to receive the video link

📝 Step 1 — Create a Custom Variable in Lemlist

Lemlist requires a custom variable to store the video link.

  1. Open your Lemlist campaign.

  2. When adding a list, scroll to the end.

  3. Click Add to create a new field.

  4. Name it something simple (example: custom).

    • Custom variables are campaign-specific, not global.

⚙️ Step 2 — Configure Your Lemlist Campaign

🚀 A. Enable Auto-Launch

  1. Send at least one test message.

  2. Open the three dots menu in your campaign.

  3. Click Auto Launch.

  4. The campaign stays active and only sends when you add a new lead.

💬 B. Add the Message That Will Use the Video

  1. Add a Chat Message step.

  2. Write something simple, like:
    ​“Hey! I recorded a video for you 👇”

  3. Click Add personalization.

  4. Select your custom variable (custom).

  5. Save.

This ensures the Sendspark video link appears inside the message.

🤖 Step 3 — Create the Sendspark Automation Workflow

Open Agentic Workflows in Sendspark and create a new workflow.

🔔 A. Set the Trigger

  1. Choose Sendspark as the trigger.

  2. Select New Video Generated.

  3. Pick the dynamic video campaign you want to automate.

This fires every time a personalized video is generated.

🔗 B. Set the Action (Send Lead to Lemlist)

  1. Choose Add a lead to a campaign.

  2. Select your Lemlist API connection.

  3. Choose the Lemlist campaign.

📨 Map Standard Fields

  • Email → Email

  • First Name → First Name

  • LinkedIn URL → LinkedIn lead URL

🎬 Map the Video Link

  1. Scroll to Lead Custom Field.

  2. Type the exact custom variable name (custom).

  3. Set type to string.

  4. Map it to Video Link from Sendspark.

  5. Save.

🖼️ How the Video Appears on LinkedIn

When Lemlist sends a message with the Sendspark link:

  • LinkedIn unfurls the URL

  • The video preview/GIF appears automatically

  • No extra configuration needed

It looks native and clean.

⚠️ Important LinkedIn Limitations

To avoid being blocked:

  • ❌ Do NOT add the video link in connection requests
    LinkedIn suppresses previews and may flag it as spam.

  • ✔️ Only send the video as a follow-up message

  • ✔️ Make sure you’re already connected

This keeps your automation compliant and safe.

🔄 Final Workflow Summary

Once everything is set up:

  1. Sendspark generates a personalized video.

  2. Trigger fires: New Video Generated.

  3. Sendspark pushes lead + video link to Lemlist.

  4. Lemlist adds the lead to your campaign.

  5. Video link fills your custom variable.

  6. LinkedIn message is sent automatically with GIF preview.

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