TL;DR: Set your lemwarm daily limit to 40 emails/day right away, keep lemlist at 1 email/day during the first two weeks, and let lemwarm build your sender reputation before you scale outreach. Most inboxes should reach full warm-up volume within 3–4 weeks, then stay there for 2 more weeks before campaigns begin in earnest.
Who Should Use This
New lemwarm users who want to connect and warm up one or more sending inboxes
Sales teams, founders, and recruiters preparing an email account for outreach
Anyone who wants to improve email deliverability before increasing sending volume
Why This Matters
lemwarm helps you build and maintain your email sender reputation over time. If you set it up correctly and increase sending volume gradually, you improve your chances of landing in the inbox, reduce the risk of spam placement, and catch deliverability issues early.
Key Concept
Set the target capacity from the start: set lemwarm to 40 emails/day immediately, which is the maximum and should match the sending capacity you plan to use in Lemlist.
Warm-up still happens gradually: even if the daily limit is set to 40, volume should ramp up progressively over time.
Never increase sending all at once: increase volume by a percentage each day instead of making sudden jumps.
lemwarm works best when left on continuously: ongoing warming helps maintain reputation, not just build it once.
Your dashboard shows results: inbox placement, spam placement, and your lemwarm score help you decide whether to adjust your sending strategy.
You can connect multiple sending addresses: add more addresses from the same person to distribute sending volume safely across inboxes.
Before you begin, decide which email address you want to warm and make sure you are ready to keep outreach activity very low while lemwarm ramps up.
Step-by-Step Guide
Choose a lemwarm plan and manage billing. Click your profile icon, select Plans & billing, then click Manage plan on the lemwarm card to open the pricing page and choose the plan that matches your needs.
Open your sending settings. From the dashboard, click your profile icon, select Settings, open Sending settings, expand the Email section if needed, and click Connect email address.
Connect the email account you want to warm. Review the connection rules, click Accept and continue, then choose your provider: Google / Gmail, Microsoft / Outlook, or Other email provider (SMTP/IMAP).
Connect multiple sending addresses if needed. You can repeat the same flow to add more sending addresses for the same user so lemwarm can distribute sending volume over multiple inboxes. Only connect addresses that belong to the same person and that you are authorized to use.
Verify the email address. Complete the verification step so lemwarm can start sending warm-up emails and handle replies for that inbox.
Start lemwarm from the dashboard. Once the inbox is connected, go to the dashboard and click Start lemwarm, then click Confirm.
Set your maximum daily volume to 40 emails/day. Do this right away. The goal is to warm the inbox at the same capacity you plan to send with in Lemlist.
Keep Lemlist at 1 email/day during the first two weeks. While lemwarm volume is ramping up, keep campaign sending extremely low.
Increase volume gradually, never all at once. If you adjust sending, do it by percentage increases each day, such as 5% or 10%, rather than jumping directly to a much higher number.
Reach 40 emails/day in lemwarm within 3–4 weeks maximum. Most inboxes should get to the full daily limit within that timeframe.
Stay at 40 emails/day for 2 full weeks. Once you reach maximum volume, keep lemwarm stable there before relying on the inbox for normal campaign sending.
Monitor performance and manage warm-up directly from the Warm up tab. Open Warm up from the left sidebar to review each connected inbox, adjust limits, check the score, and stop warm-up when needed.
Organize lemwarm emails outside your main inbox. To avoid clutter, create a filter in your email provider to automatically move lemwarm emails out of your primary inbox.
Important: Total warm-up time is usually about one month: roughly 2–3 weeks to reach max volume, plus 2 weeks of stabilization at 40 emails/day. Do not start real campaign sending just because a few days have passed—wait until both time and score indicate the inbox is ready.
When to Start Sending Campaigns
The right time to start campaigns is based on a combination of time and score.
Be at your target sending capacity in lemwarm, such as 40/day, for 1–2 weeks
Make sure everything is going correctly in the dashboard
Your lemwarm score should be over 90
If your score is still below 90 after reaching and maintaining your target volume, there may be a domain-related issue increasing spam placement. In that case, spend more time at the same lemwarm volume before launching campaigns.
How You’ll Know It Worked
✓ Your email account is connected and verified in lemwarm
✓ Warm-up emails begin sending after you click Start lemwarm
✓ You can add multiple sending addresses for the same user when needed
✓ You reach 40 emails/day in lemwarm within about 3–4 weeks
✓ After staying at 40/day for 2 weeks, your deliverability score is above 90
✓ Your spam rate stays around 1–2% maximum
Understanding Your Reports
Your lemwarm dashboard helps you track whether warming is improving your deliverability. Use it regularly to spot issues before they affect your outreach.
lemwarm score: shows the overall health of your email deliverability
Inbox vs. spam results: shows how many emails are landing in the inbox compared with the spam folder
Cold Email Performance graph: tracks sent emails and shows inbox placement in green versus spam placement in red
Reply Performance graph: tracks whether replies to your emails are landing in the inbox or spam folder
At 40 emails/day for 2 full weeks, expected results are:
Deliverability score over 90
Spam rate of 1–2% max
Because lemwarm emails contain no links and no images, there is normally no reason for them to land in spam at a higher rate.
How the lemwarm Score Works
70% of the score comes from fixed factors such as domain age and your SPF, DKIM, and MX configuration
30% of the score comes from your inbox rate over the last 2 weeks
If your inbox rate is 98–99% over the last 2 weeks, your score should usually land around 91–93%
If your score is between 80 and 90, there may be a problem with the domain name that is raising the spam rate
If your score is between 80 and 90, do not rush into outreach. Stay longer at the same lemwarm volume and keep monitoring the spam rate.
Transitioning from lemwarm to lemlist
Once you are at 40/day in lemwarm and everything looks good, reduce lemwarm to 10–20/day and start sending with Lemlist at 40/day.
This gives you a total combined capacity of about 50–60 emails/day, which is already high for a mailbox that is only 2–3 months old.
Two approaches are acceptable:
Option A: Start Lemlist immediately at full volume while reducing lemwarm
Option B: Gradually increase Lemlist each day, for example 5 → 10 → 15/day, while decreasing lemwarm by the same amount each day
Option B is the best technique, but it requires close attention and is harder to follow consistently.
Why Keep lemwarm Running While Sending with Lemlist
Continuity: if your Lemlist campaign ends and there are no more leads to contact, the email account is still active and sending
Early warning system: if your reputation starts to decline in Lemlist because of bad copywriting, poor setup, or another sending issue, it will also affect lemwarm
Keeping 10–20 lemwarm emails/day active gives you a signal. If spam starts increasing in lemwarm, that is a sign that Lemlist activity may be hurting the mailbox reputation. If that happens, lower Lemlist volume or stop Lemlist entirely until performance recovers.
When to Pause lemwarm
Pause lemwarm only if the sending habits in lemlist are seriously damaging the mailbox reputation and polluting the lemwarm pool.
In that case:
Pause lemwarm for 1–2 weeks
Fix the sending issues in Lemlist
Start warming again slowly to avoid burning the email address
You can also stop warm-up directly from the Warm up tab for a connected inbox when you need to pause activity temporarily.
Troubleshooting
Issue: Deliverability is not improving after a few days
Root cause: Email warming takes time, and the inbox may still be in the early reputation-building phase.
Fix:
Keep lemwarm running continuously for about one month
Reach 40/day and hold it there for 2 weeks
Avoid sending high-volume outreach too early
Increase volume gradually instead of all at once
Issue: Your lemwarm score is below 90 even after reaching 40/day
Root cause: There may be a domain-related issue increasing the spam rate, or the inbox may need more time at the same volume.
Fix:
Stay at the same lemwarm volume longer
Review domain setup, including SPF, DKIM, and MX
Do not launch campaigns until the score improves
Issue: Warm-up emails seem too high or too low
Root cause: The inbox may not be following a gradual enough ramp-up pattern, or sending may have been increased too aggressively elsewhere.
Fix:
Keep the maximum daily volume at 40/day
Make sure any sending increases happen in small percentage-based steps
Keep Lemlist at very low volume during the first two weeks
Issue: Your inbox is filling up with lemwarm emails
Root cause: No inbox filter has been set up for warm-up emails.
Fix:
Create a filter in your email provider to automatically sort lemwarm emails
Move those emails out of your primary inbox view
Review your provider’s filtering rules if emails are still appearing in the main inbox
Issue: You need to warm more than one sending address
Root cause: Only one inbox has been connected so far.
Fix:
Go to Settings → Sending settings
Click Connect email address and repeat the connection flow
Only add addresses for the same person and authorized account owner
Issue: Leads are marking outreach emails as spam
Root cause: The issue may come from email content, subject lines, sending limits, or lead quality rather than warm-up alone.
Fix:
Reduce your daily outreach volume temporarily
Review and improve your email copy and subject lines
Check the quality and relevance of your lead list
Use lemwarm as an early warning signal and watch for rising spam placement there
Best Practices
Set lemwarm to 40 emails/day from the start
Keep Lemlist at 1 email/day during the first two weeks
Never increase sending volume all at once
Connect multiple sending addresses only when they belong to the same person
Reach full warm-up capacity within 3–4 weeks and stabilize there for 2 more weeks
Start campaigns only when your score is over 90 and performance is stable
Keep lemwarm running at 10–20/day even after outreach starts, if possible
Watch the dashboard regularly for warnings or changes in inbox placement
Adjust content, targeting, or sending volume if spam placement increases