Yes — Mailpro lets you merge two or more lists into one in a few clicks. Duplicates are auto-removed and each contact's history is preserved.
Pro tip: before merging, export your lists as CSV — you'll have an independent backup.
How to merge
- Log in to Mailpro
- Go to Contacts → Lists
- Pick the destination list
- Click Import / Merge
- Choose the source list to merge in
- Confirm the merge
What's preserved
- Every unique contact from both lists
- Consolidated custom fields
- Each contact's history
- Tags and segments
Duplicate handling
| Case | Mailpro action |
|---|---|
| Email in both lists | Counted once |
| Field filled only in one | Value preserved |
| Field with two values | Strategy of choice (recent / source) |
| Unsubscribed | Stays excluded, GDPR compliant |
Pre-merge best practices
- Clean hard bounces in each list
- Check custom-field consistency
- Back up lists as CSV before the action
- Keep the originals — the merge creates a new aggregate
More on the duplicate management page.
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