Lemwarm is the email warmup product by Lemlist that gradually increases sending volume and generates positive engagement signals for a new or damaged sending domain — building sender reputation before cold outreach campaigns are launched. It integrates natively within the Lemlist platform for users running cold email campaigns.
Product Overview
Lemwarm operates by sending emails between a network of 20,000+ accounts that open, reply to, and mark as important emails from the warmed domain — signalling to email providers that the domain is legitimate and engaged-with. The warmup schedule follows an intelligent ramp-up: starting at low daily volumes and increasing gradually based on domain age and current reputation signals. For Lemlist users, Lemwarm is the natural deliverability layer that runs before and alongside campaigns — both are managed in the same platform. For non-Lemlist users, Lemwarm connects to any Google Workspace or Microsoft 365 account. Custom schedules allow teams to define warmup pace based on planned campaign launch timelines.
Key Features
- Automated Warmup Network: 20,000+ account network generates opens, replies, and positive signals for the warmed domain automatically.
- Intelligent Ramp-Up: Gradual volume increase based on domain reputation signals — avoids triggering sending limits during warmup.
- Deliverability Score: Real-time sender reputation score showing warmup progress and estimated inbox placement readiness.
- Custom Warmup Schedules: Define warmup pace and target volume based on planned campaign launch timeline.
- Lemlist Integration: Native integration with Lemlist campaigns — warmup and outreach managed in the same platform.
Best For
Sales and marketing teams preparing new domains for cold email outreach — particularly those already using or considering Lemlist as their sending platform.
Pricing
From $29/month per inbox. Discount when bundled with Lemlist subscription.
Key Integrations
Lemlist, Gmail, Google Workspace, Outlook, Microsoft 365, Zapier, HubSpot, Salesforce, Instantly, Mailshake
Pros
- Native Lemlist integration makes it the natural choice for Lemlist users
- Affordable per-inbox pricing relative to standalone warmup platforms
- 20,000+ account warmup network provides good coverage
- Intelligent ramp-up reduces risk of triggering spam filters during warmup
Cons
- Less effective as a standalone tool for non-Lemlist users where dedicated warmup platforms are superior
- Warmup results vary — some domains improve significantly, others see minimal change
- Long warmup timeline (4–8 weeks typically) requires advance campaign planning
