If I upload a list with duplicate contacts, will SendFox register them as separate contacts?

SendFox keeps one contact per email address, so uploading a list with duplicates won’t create double entries — the same person is only ever stored once.

How de-duplication works

When you import a CSV, SendFox matches contacts by email address:

• If the same email appears twice in your file, SendFox imports it once and registers a single contact.
• If an email already exists in your account, SendFox updates that existing contact instead of adding a duplicate.

This applies whether the duplicates are within one upload or across multiple uploads over time.

Troubleshooting

My import count is lower than my file’s row count

• That’s expected when your file contains repeated emails — each unique email becomes one contact, and rows that match existing contacts update them rather than adding new ones.

I want to update existing contacts

• Re-import a CSV with the same email addresses; SendFox will update those contacts in place.

Need help with an import? Reach us through the Help Center.

Frequently asked questions

Does SendFox merge duplicate contacts I already have?

SendFox prevents duplicates at import by matching on email, so the same address is stored once.

Which field identifies a duplicate?

The email address. Two rows with the same email are treated as the same contact.