To send an email to a subset of your mailing list, follow these steps:
1. While you are in the process of sending out your e-newsletter, click on the “Enable Delivery Filtering Options” link.
2. This will open up a new section with a lot of different options. You can, for example, send to a group of subscriber who joined after a specific date, if you added subscribers to your mailing list after you sent out a recent email.
3. Once you are done, click the “Update Subscriber Count” button to see how many people you will be sending the e-newsletter to.
4. Complete the rest of the steps as normal and click the “Send Newsletter” button.