Spot and fix deliverability issues before they show up in your reply rates

Full visibility over warmup health, outreach performance, and inbox placement. With alerts so you act before results drop.

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Join our webinar and fix deliverability before your emails stop landing

Most teams only think about deliverability when something breaks. Join us for a webinar where we'll show you how to stay ahead of it. You'll get a hands-on walkthrough of lemlist's deliverability ecosystem: technical setup, sender reputation, and content.

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Most teams only see the damage after it's done.

Your campaign stats hide what's actually broken
Deliverability damage builds silently across mailboxes
By the time reply rates drop, it's already too late

Stop switching between tools to understand what's happening.

One view for warmup health, outreach performance, and inbox placement. Filter by mailbox, provider, or domain to find the source of a problem fast.

Know when your mailboxes are actually ready to send.

Track inbox vs. spam ratios per mailbox as it warms up. No more guessing when to start, or finding out too late that a mailbox was never ready.

See exactly which mailbox, provider, or domain is dragging your deliverability down.

Bounce trends and delivery rates across every campaign, drilled down to the sender causing the problem.

Your outreach stats can't show you where emails land. Inbox placement can.

Send to real test addresses across Google, Microsoft, and others. See whether you're hitting the primary inbox, promotions, or spam before it costs you replies.

Stop watching dashboards. Start getting notified.

Bounce rate spiking? Spam count rising? lemlist notifies you the moment a real trend emerges so you can fix it before it hits your pipeline.

Frequently Asked Questions

Because the signals are spread across different tools. Warmup data lives in one place, campaign bounce rates in another, and there's nothing connecting the two. By the time open rates drop enough to notice, the damage is already done. A single view across all your sending changes that.
Open rate only measures the people who saw your email. If a chunk of your emails are landing in spam or promotions, those contacts never open anything, and they don't show up as a problem in your stats. Inbox placement testing shows you what's actually happening, not just what the survivors reported back.
Mailbox providers continuously re-evaluate your sending behavior. A list that gets stale, a volume spike, a campaign with higher than normal bounces and any of these can quietly erode your reputation over weeks. Monitoring catches the drift before it becomes a problem.
Placement can change based on what you're sending, who you're sending from, and how your domain has been performing recently. A sender that placed well last month might not today. Testing before launch is the only way to know for sure before it affects real replies.
Deliverability issues don't wait for your Monday review. A bounce rate spike on a Thursday afternoon can do significant damage before anyone notices. Alerts mean you find out when it happens, not days later when you happen to open the dashboard.

A calendar full of opportunities starts here.

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