I use Ratepoint because they also offer a review (testimonial) widget I have posted on my site. Ratepoint has a promotion that offers free mailing list service forever if your list is 125 or less. Obviously most of us will want more than 125 folks reading our newsletters but it’s a good start. Good templates, tracking and definitely awesome support.
One time, a long time ago, I was having trouble trying to create a customized email Opt-In box for a client. He wanted some crazy thing created by someone on Fiverr to be in the box. The customer support when over and above what could possibly be expected of them to make it work. The guy I was talking to had to give the project over to one of their tech / coding experts to fix the problem and he did. I was truly impressed.
Using the Personalize dropdown, you can insert custom snippets like your subscribers first name, or sign up date, and AWeber will automatically insert that data specific to each subscriber if we have it. If you collect first name, for example, you can send an email that says Hello Tom, or Hello Mary, or Hello John, depending upon who you’re sending to.