How Do I Upload a CSV File of Email Domains to Blacklist?

Last updated: March 26, 2025

🔍 Article Overview:
This article explains when you should upload a CSV file of email domains to blacklist and how to do it.


🙋 When to upload a CSV file of email domains to blacklist?

Uploading a CSV file of email domains to blacklist enables you to prevent email campaigns from being sent to prospects from specific domains. To ensure that your upload is successful, your file must meet specific requirements.


🙋 How do I upload a CSV file of email domains to blacklist?


Step 1: Prepare Your CSV File

  • Create a file containing a single column of data containing all of the domains that you DO NOT want to send outreach emails to.

  • Save the file using the file format .csv

  • Select the campaign that you would like to blacklist email domains

Step 2: Upload Your CSV File

  • Go to the Blacklisted Email Domains section of the campaign's Targeting tab

  • Click the Upload CSV button

  • Choose the file you want to upload by dragging and dropping the file in the appropriate area OR click to browse and select the file from your local drive

  • Make sure to compare it to the provided Sample CSV Format - this is how rows in your file should be structured:

    • Blacklisted Domain (Mandatory)

  • Click Upload All Entries in the bottom right corner

Leads from the blacklisted domains will no longer be contacted!


💡 CSV files are sensitive to formatting errors, so review and validate the structure prior to uploading the file.


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