Kick off by thanking your subscribers for signing up for your email newsletters. Saying thank you is a great way to start off a positive relationship with your newly added subscribers and welcome them to your brand's family. It shows that you appreciate their interest and are happy that they want to stay up-to-date with your brand. It is also a great way to let your subscriber know that you received his or her request to subscribe to your newsletters. You can even take this email to the next level by adding a call-to-action button to your website or to your store, paving the way to drive your potential leads further along the sales cycle.