How do I add more leads to an existing campaign?

THIS ARTICLE IS FOR: All ListKit customers
​Stage: Live
​Owner: CS
​Last updated: Aug 2026
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As your campaign runs through your leads list, you may want to add fresh contacts to keep it going without starting from scratch. This is the correct way to do it, pausing the campaign, importing additional leads, and republishing, without losing any of your existing contact history or reply threads.
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Do not delete your existing leads list when adding new leads.

Removing your current leads list deletes all email threads associated with those contacts, including any replies, conversations, and history. This cannot be undone. When importing additional leads, always add to the existing list rather than replacing it.
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Step 1: Go to Campaigns

Go to Email Engine in the left sidebar and click Campaigns.

Step 2: Pause your campaign

Find your active campaign and click the three dot menu next to it. From the list that appears, select Pause.

Step 3: Open the campaign

Once the campaign is paused, click on the campaign name to open it.
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Step 4: Click Add Campaign Details

Inside the campaign, click Add Campaign Details to return to the lead import step.

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Step 5: Import your additional leads

Import your new leads via Upload CSV or Import from Order History. DO NOT remove or replace your existing leads list, only add to it.
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Click Import Leads to confirm.

​Step 6: Continue and republish

Continue through the campaign steps and republish. Your campaign will resume sending with the new leads added to your existing list.
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Your campaign resumes with the new contacts added alongside your existing leads. All previous email threads and reply history are fully preserved. Your campaign continues sending as normal from where it left off.
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What happens if I delete my existing leads list when adding new ones?
Deleting your existing leads list removes all email threads associated with those contacts permanently. This cannot be undone. Always add to your existing list rather than replacing it.
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Can I add leads to a campaign without pausing it?
No. You need to pause the campaign before you can access the lead import step. The campaign will resume automatically once you republish after adding your leads.
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Will my existing contacts be affected when I add new leads?
No. Adding new leads does not affect contacts already in the campaign. They will continue through the sequence as normal.
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How do I know my campaign has resumed after republishing?
Your campaign status will return to Active on the Campaigns page once it has been successfully republished.
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Can I add leads from both a CSV and Order History at the same time?
Yes. You can import from both sources in the same session before clicking Import Leads to confirm.