So many options here. Poke around and find what fits your needs best. Also, pay attention to usability. Some eNewsletter tools are easier than others to use.
- ConstantContact: Great responsive customizable templates geared towards small businesses. Starts at $20 per month.
- MailChimp: Free for less than 2,000 subscribers. Great templates and responsive design options.
- MyEmma: Great tools and metrics. Automation. Nonprofit pricing.