How to Format Your Mailing List

Make sure your mailing list will be error-free and can be uploaded without any issues. Here’s how to format your mailing list. Download our Corefact Sample Format to see our recommended formatting for your mailing lists.
Mailing List Tips
- Make sure your file is an Excel, CSV, or XLS file format. Publisher and Word files are not accepted.
- All columns need headers.
- Additional columns must be checked “DO NOT MAP” in every area listed.
For more tips, view our Contact Mailing List PDF.


Have additional mailing list questions? Head over to our Uploading and Managing Mailing Lists article.
Need help?
Our Customer service team is ready to come to the rescue:
Call us: +(866) 777-3986
Monday through Friday 8:00 AM - 5 PM PST
Email: CS@Corefact.com
Related topics
How to Upload and Manage Your Mailing Lists
Watch our tutorial on how to upload and manage your list of prospects and clients.
Read More
What Does "Print Is Not Ready" Mean?
You don’t need to worry about the “Not Print Ready” status. This means the file needs to be converted to PDFX format in order to be read properly by our printers.
Read More