Where do I start?
To upload your Known Customers file you will first d
etermine if you want to upload in text or SHA256. If you prefer SHA256, you will need to convert the emails. To learn more about SHA256, click here.

SHA256 (also known as a hash file) is a one way encryption that can turn an email address into a code without people being able to see what that email address is.
Should you require assistance, we offer an Excel Template that will facilitate the conversion for you. The file is attached below, along with a Sample CSV for reference.
The upload template is straightforward and contains three columns, with only one column being mandatory: Email Address.
You MUST have all headers in your upload file.
Once your Excel files are prepared and saved as a CSV file, you may upload the CSV directly to your dashboard.
Can I upload into Known Customers with a large file?
The Known Customers Function allows you to upload up to 100,000 records at a time.
Due to browser limitations, if your data set exceeds 100,000 records, you will have two options.
- You need to use multiple Excel files and perform several uploads
- To upload a larger file, please reach out to customer success, here.

Browser limitations only allow 100,000 records at a time. Customer success can assist in larger uploads.
The Known Customers function, when automated, ensures that duplicates are not sent.