Lemlist

What It Does

Adds leads to a Lemlist email campaign for automated cold email outreach. Leads are deduplicated — if a lead is already in the campaign, it is silently skipped.

Authentication

API Key. Go to Settings > Connections > Lemlist and enter your Lemlist API key. During setup, you also select which campaign receives the leads.

Data Sent to Lemlist

Midbound Field	Lemlist Field
Work email (fallback: personal)	Email (required)
First name	First name
Last name	Last name
Company name	Company name
Job title	Job title
LinkedIn URL	LinkedIn URL
Company domain (from work email)	Company domain
Work phone (fallback: personal)	Phone

Key Behaviors

• Email required — Unlike HeyReach, Lemlist requires an email address. If no email is available, the action fails with an error.

• Built-in deduplication — Lemlist's API automatically checks for duplicates. If the lead already exists in the campaign, Midbound detects this and skips gracefully (no error).

• Company domain extraction — If a work email is present, the domain (e.g., "acme.com") is automatically extracted and sent as the company domain for Lemlist's personalization features.

• Campaign selection — During connection setup, you choose which Lemlist campaign receives the leads.

Using with Workflows

1. Connect Lemlist and select your target campaign

2. Build a workflow triggered by audience entry or visitor identification

3. Leads with email addresses are added to the campaign automatically

4. Leads already in the campaign are skipped — no duplicates

Related

• Integrations Overview