Go to Deliverability Hub.
In the left navigation, click Deliverability hub. Then select the area you want to explore:

Set filters before you interpret any metrics.
Use the top filter bar to focus on the right slice of data:

This is the fastest way to confirm whether a deliverability drop is localized (one sender/provider) or systemic (domain-wide). Remember that the sending ceiling is per provider, not per mailbox, so a provider-level view is often the one that explains a drop.

Start with the headline Outreach KPIs.
In lemlist | Outreach, use the KPI cards to quickly assess performance in the selected time range:

Check delivery vs. bounce trends over time.
Use the charts to see whether deliverability issues are getting worse, improving, or spiking on specific days (often a clue for list quality changes, provider throttling, or sending volume changes).

Identify which providers are driving the problem.
The Performance by Email Provider table helps you compare performance by sender/recipient provider (e.g., Google → Google vs. Microsoft → Google). If one provider pair shows a much higher bounce rate, prioritize investigation there.

Drill down by mailbox to find the sender at risk.
The Outreach Performance by Mailbox table makes it easy to see which mailbox has abnormal bounce rates or reduced delivery rate—ideal for Sales Ops and managers overseeing multiple senders.

Review performance by recipient domain.
Use Outreach Performance by Recipient Domain to spot domains that systematically bounce. This can reveal segmentation issues (e.g., a specific target domain set), data quality problems, or domain-specific blocking.

Open Inbox placements and start a new test.
Go to Inbox placements, then click Run inbox placement test. This is where you manually test whether your email lands in the inbox, promotions, or spam.

Select the sender first.
In the Run inbox placement test modal, choose the mailbox you want to test in the Sender field. Use a real sender that is actually running campaigns — a clean test from a mailbox nobody sends with proves nothing.

Optionally attribute the test to a campaign step.
If you want to test a live sequence or understand placement for a specific message, select a value in Campaign/step attribution. If not, you can leave it empty and run a manual test.

Review or write the test content.
Add your Subject and Email content, or let lemlist auto-fill them from the selected campaign step. Test the content you actually send: placement depends heavily on the exact message, so a template nobody uses will not tell you anything useful.

Check available credits, then launch the test.
Confirm you have a test credit available, then click Run test. lemlist will send the placement test and start processing results.

Wait while the placement test runs.
Once submitted, you’ll see a progress state confirming that the test is in progress. Results are typically ready within a few minutes.

Track all inbox placement tests in one table.
Back in Inbox placements, use the results table to monitor all tests in one place. You can review the date, campaign, step, user, mailbox, lead test data, score, and source.

Open a test to review detailed placement results by provider.
Click any inbox placement test to open its details. You’ll see overall results plus a provider breakdown showing whether the email landed in the inbox, tabs, spam, or went missing across providers like Google, Microsoft, and SMTP/IMAP.

Switch to Warm-up to assess reputation signals.
Open lemwarm | Warm-up to monitor warm-up performance without leaving lemlist.

Review real-time warm-up health signals.
The top KPI cards give you a quick snapshot of warm-up performance (based on selected filters), including:

The Deliverability Score is a weighted composite, not a placement percentage — a score of 80 is not an 80% inbox rate. Read the Inbox Rate card for placement, and the score for overall mailbox health. Once campaigns are live, a score below 80 is a reputation problem and below 65 means pause and investigate.

Compare deliverability score trends by mailbox and by domain.
Use these charts to spot whether a deliverability issue is isolated to a single mailbox (sender reputation) or affecting an entire domain (domain reputation/authentication/sending behavior). A score that falls week to week is almost always the spam-rate component — look at content, targeting and volume rather than DNS.

Use the mailbox warm-up summary to manage at scale.
The Mailbox Warm-up Summary table provides an operational view per mailbox (average score, inbox/spam counts, daily limit, ramp-up). This is especially useful for Sales Ops teams managing multiple senders — it is where you check that each mailbox's daily limit and ramp-up match its phase: warming mailboxes at their target with a ramp-up of 1, and live mailboxes at a residual 10/day.

Open the Alerts tab and start creating an alert.
Go to Alerts, then click Create an alert in the section you want to monitor (Warm-up or Outreach).

Configure the alert type, target, and severity.
In the Email deliverability alerts modal:

Define when the alert should trigger.
Set the threshold logic:

This prevents overreacting to one-day anomalies and helps you track real trends. Alerts are the right tool for continuous monitoring — they are what let you leave placement testing at 1–2 per month without flying blind in between.

Choose how you want to be notified (Email and/or in-app).
Enable Email notifications to alert additional stakeholders (e.g., Sales Ops, managers, agencies), and keep In-app enabled for quick visibility in lemlist.

Verify your alerts are active.
Once saved, your alert appears in the corresponding list (Warm-up alerts or Outreach alerts), showing the metric, target, and threshold rules.

Review Alert logs to track incidents over time.
Use Alerts logs to see when alerts were triggered and whether they’re active or resolved. This is helpful for reporting, audits, and understanding whether your fixes worked.