Duplicate lead handling
Avoid sending the same person repeated outreach.
Duplicates can inflate counts and create a poor recipient experience.
What this helps you do
Duplicates can inflate counts and create a poor recipient experience.
Recommended workflow in Outlio
Check for duplicate emails before upload.
Review importer warnings.
Keep one canonical row per email.
Avoid overlapping campaigns for the same segment.
Stop or remove duplicates if found after launch.
Quality checks
- Deduplicate by normalized email address.
- Keep source fields so you can trace duplicates.
- Check duplicates across active campaigns, not only one CSV.
Common mistakes to avoid
- Using different casing to bypass dedupe.
- Uploading the same list into several campaigns.
Done well, this should leave you with
A cleaner Outlio setup, fewer avoidable campaign issues, and a more reliable path from setup to replies.
Related articles
CSV formatting for lead imports
Prepare a CSV that imports cleanly.
Mapping CSV fields
Match uploaded columns to Outlio fields.
Required and recommended lead fields
Know which lead data matters most.
Lead statuses explained
Understand where leads are in the campaign lifecycle.
Stop sending to specific leads
Prevent future sequence steps for selected contacts.
Export campaign leads
Download leads and campaign outcome data.
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