As you may recall, we send these Daily Nuggets out using a process in our own office. At least 3 people are involved in preparing these every day and the Nuggets are tested on different email readers and cell phones before sending them to you. It's part of our job to do this for you and we spin these out fast enough using our internal process instead of paying an outside service.
On the other hand, you need to spend time selling jewelry and not fiddling with sending email, so it would behoove you to pay for a service.
Let's name check some services. We do not specifically recommend any of these, and each one will work depending on your needs.
1. Mail Chimp - This is built into Gmail and could make your life easy.
2. Constant Contact - This is probably the de facto standard when you want easy to set up newsletter...