You can send a receipt to your entire donor base. To do this, go to your Donors page and select the Send All Receipts button.
When you click on it, a pop-up window will show a preview of the email. Click Send Receipts to send a mass email to all of your donors with the 2017 Year-end receipt.
Please note: it may take up to 15 minutes for all of your donors to receive their receipt.