TL;DR: Use lemwarm to choose a plan, connect an email address from Sending settings, configure warm-up from the Warm up tab, and monitor results from your dashboard reports. Setup usually takes about 5–10 minutes.
Who should use this
New users setting up lemwarm for the first time
Anyone who wants to connect an email account and start warming it safely
If you already have a warmed-up inbox running, you can skip this guide and go straight to monitoring your reports
Why this matters
A proper warm-up helps your email account build and maintain a stronger sending reputation. That makes it more likely your future emails land in the inbox instead of spam, and gives you a safer ramp-up path before launching outreach campaigns.
Warm-up runs in two phases before any campaign: about 40 days of ramp-up at an increment of 1, then 14 days of stabilization holding at target. Keep lemlist at 0 for both. Only begin outreach once your deliverability score reaches 90+, lemwarm shows no spam, and your inbox rate has stayed above 90% for 14 straight days.
Step-by-step guide
1. Open your lemwarm dashboard.
When you land on the dashboard, you’ll see the setup boxes that guide you through verification, plan selection, email connection, and launch. Click Choose a plan to continue.
2. Choose a lemwarm plan.
If needed, you can also open billing from your workspace and click Upgrade plan.
Then select the plan that fits your needs. The available plans are Essential and Smart.
3. Connect the email address you want to warm up.
Click your profile in the bottom-left corner, open Settings, go to Sending settings, expand the Email section if needed, then click Connect email address. This is where you add the mailbox that lemwarm will warm up.
In Sending settings, use Connect email address to add the mailbox you want to warm up.
4. Start or manage warm-up from the Warm up tab.
Open the Warm up tab from the left sidebar, find your connected mailbox, then review or adjust the Warm-up and Ramp-up increment values before clicking Start or Stop.
5. Set warm-up values based on your target sending volume.
First determine your target daily volume in lemlist — how many emails a day this mailbox should send once it is live. For a new mailbox the recommended range is 30–40 emails per day. That target volume is the Warm-up value you set in lemwarm.
Next, set the Ramp-up increment. For a new mailbox the recommended value is 1 email per day. Use 2 only on an older mailbox with real traffic history, and 3 only when rebuilding after an incident.
So, a recommended setup for a new mailbox looks like this:
Warm Up: 30–40, matched to your target lemlist volume
Ramp Up Increment: 1
Example: if your target volume in lemlist is 35 emails per day, set Warm-up to 35 in lemwarm and keep the Ramp-up increment at 1 so the volume increases gradually. Do not pick a default number — warming to 16 a mailbox meant to send 35 trains it for the wrong job, and warming to 40 a mailbox that will only send 20 is just as wrong.
Good to know: lemwarm can set these values automatically based on your deliverability score. Manual settings are useful if you want tighter control over ramp-up.
6. Track deliverability from the dashboard.
Once warm-up is running, go back to the dashboard to monitor your Deliverability score. This score helps you understand whether your mailbox is becoming safer to use for outreach. Aim for a score above 90 — and confirm no spam is showing in lemwarm and that your inbox rate has held above 90% through the 14-day stabilization period — before launching outreach campaigns.
You can also review the detailed chart to see where your cold emails are landing over time, including inbox and spam placement trends.
7. Change the warm-up value when campaigns go live.
Warm-up settings are not set-and-forget. On the day you launch your first campaign:
Open lemlist at 30/day, and move to 40 only once a month of clean sending is behind the mailbox
Drop lemwarm to 10/day. From this point those 10 emails are no longer warming anything — they report reputation
If you run inbox placement tests instead (1–2 per month), those can replace the residual 10. One of the two must always be in place
Keep total output — lemlist + lemwarm + manual replies — under 70/day per provider
How you’ll know it worked
✓ Your email address appears as connected in Settings → Sending settings
✓ Your dashboard shows a Deliverability score and report activity
✓ The mailbox appears in the Warm up tab with editable warm-up values
✓ Your warm-up value matches the volume the mailbox will send in lemlist
✓ You can start, stop, and monitor warm-up from the lemwarm workspace
Troubleshooting
Issue: The Start lemwarm button is unavailable.
Root cause: One of the earlier setup steps is still incomplete.
Fix:
Check the dashboard boxes and confirm plan selection, email connection, and verification are complete
If the mailbox is connected but not verified, finish the verification step first
Issue: The mailbox does not appear in the Warm up tab.
Root cause: The email address was not fully connected in Settings → Sending settings.
Fix:
Go back to Settings → Sending settings
Click Connect email address and reconnect the mailbox
Return to the Warm up tab and confirm the mailbox is listed
Issue: Too many lemwarm emails are showing in the inbox.
Root cause: No mailbox filter or rule has been created yet.
Fix:
Create a Gmail filter or Outlook rule for the subject lemwarmup
For Gmail, use actions like Skip the Inbox and Never send it to Spam
Issue: Warm-up numbers feel too aggressive.
Root cause: Manual settings may be too high for your intended sending volume.
Fix:
Open the Warm up tab
Set the Warm-up value to match your target daily volume in lemlist
Reduce the Ramp-up increment to 1 to slow the increase
Between two numbers inside the 30–40 range, take the lower one