%20(1).png)
You’re doing cold email the smart way.
You’ve set up SPF, DKIM, and DMARC. You’ve personalized your message. You’ve built a solid lead list.
But your emails still land in spam, or worse, disappear completely.
So you turn to warm-up tools. lemwarm shows up early in your search.
It’s popular. It's bundled with lemlist. It promises better inbox placement.
But here’s the question no pricing page answers:
Does Lemwarm actually help your emails land in the inbox, and stay there?
We reviewed dozens of user reviews, analyzed the mechanics behind lemwarm’s warm-up engine, and compared it to what high-performing teams are using in 2025. Here's what we found:
lemwarm is a warm-up automation tool built by the team at lemlist. It connects your inbox to a shared network of mailboxes and automatically simulates engagement activity to boost your sender reputation.
That includes:
The theory behind this is simple:
If mailbox providers see positive engagement, they’ll be more likely to place your emails in the inbox when you launch real campaigns.
But theory doesn’t always match reality, especially when engagement isn’t coming from real recipients or isn't diverse enough to reflect normal usage.
We pulled insights from Reddit, G2, LinkedIn, Quora, and more. While reviews vary, several consistent patterns emerged.
Many users report early improvements in inbox placement. lemwarm helps reduce spam complaints and increase open rates in the first few weeks.
But when teams ramp up volume or begin sending cold campaigns, those gains tend to taper off.
“After the first few weeks, results just…flattened.”
This is especially common among agencies or teams using multiple inboxes. The initial lift doesn’t hold under scale, which suggests the warm-up activity isn’t building long-term domain trust.
lemwarm says its warm-up network spans over 100 countries, using inboxes from real users across the globe to simulate engagement.
That sounds impressive on the surface. A global footprint implies diversity, credibility, and a broader sender reputation.
But here’s the part lemwarm doesn’t clarify:
The value of a warm-up network isn’t just about how many countries it includes. It’s about where those inboxes are based, how engaged they are, and how mailbox providers perceive them.
Inboxes from countries with low trust scores or low engagement expectations might look good on a map, but do little to improve your sender reputation in the U.S., U.K., Canada, or Western Europe, where most cold email campaigns are actually targeting.
Without transparency into inbox location, configuration, and behavior, you’re left guessing. And in deliverability, guessing is a liability.
Real warm-up value comes from trusted, monitored inboxes , not just global coverage.
lemwarm’s UI gets consistent praise.
It’s easy to set up, with a minimal learning curve. If you’re a lemlist user, integration is seamless. New users can launch a warm-up campaign within minutes.
This makes lemwarm appealing to solo founders, freelancers, or small teams.
But that simplicity also comes with limitations. There’s little flexibility for advanced users, no inbox-level customization, and limited reporting.
This is where lemwarm becomes a tough sell for agencies or multi-inbox operations.
lemwarm charges per inbox.
If you're warming 2 inboxes, that’s manageable. But if you're managing outreach across 20, 50, or 100 inboxes, pricing scales fast.
Several core features, like custom templates or sending schedules, are gated behind higher-tier plans. So not only do you pay more per inbox, but you also need to upgrade just to unlock the features that should arguably be standard.
This pricing model creates friction for any sender managing cold email at scale.
The biggest issue isn’t the UX, or even the pricing. It’s the limited scope of what lemwarm offers.
lemwarm does a solid job helping you get started with inbox warm-up, especially if you’re new to cold email. But when your outreach scales, or when deliverability becomes a bigger challenge, the tool doesn’t offer enough to support long-term inbox placement.
Here’s what it’s missing:
lemwarm gives you a good starting point. But if you're managing outreach across multiple domains, trying to scale consistently, or recovering from deliverability issues, you’ll likely need more than basic warm-up automation. Mailivery offers the tools and infrastructure to support that next level.
When lemwarm starts to fall short, experienced teams look for tools that offer more than warm-up simulation.
Mailivery is one of those tools, and it's gaining traction among agencies and SaaS teams.
It positions itself not as a warm-up utility, but as a full deliverability platform. That difference matters.
Here’s how it stands apart, in brief:
Mailivery uses a vetted pool of monitored inboxes. There are no bots, no fake domains. Engagement runs through IMAP and SMTP, not browser emulation.
There’s no per-inbox pricing. You pay based on total daily warm-up volume, whether that’s 3 inboxes or 300.
Beyond warm-up, Mailivery includes:
It’s designed to protect sender reputation across all phases of outreach.
Mailivery works directly with agencies and platform partners to improve features based on feedback, not tickets or bots.
If your goal is to stay in the inbox, not just get there once, you need tools that go deeper than lemwarm.
The easiest way to get responses to your cold emails.
