www.officeautopilot.com (Not Free - But 15 Day Free Trial): OfficeAutopilot is a real COOL tool with mind boggling features that goes beyond and Autoresponder service! The site is very user friendly and they get high deliverability. Apart from sending emails, you can set up post cards and can make pre-recorded phone calls. You can also process orders through their shopping cart. This awesome service does not come cheap but you can have a free trial.
InfusionSoft is the tool of choice for serious marketers. If you run a six figure online business or have a list larger 50,000 subscribers, this may be the tool for you. InfusionSoft combines your shopping cart with email marketing, so you can do complex things like segregate your buyers from your subscribers or mail specific sequences to specific people. You can also send physical postcards from InfusionSoft. InfusionSoft isn’t cheap. The monthly subscription is in the hundreds, and there’s a four figure setup fee. It’s geared towards companies that are already successful and need powerful solutions, rather than startups.
GoDaddy Email Marketing provides great statistics to show you how many people are opening, engaging with and sharing your email. There’s no mystery or guesswork. You can even compare different emails side-by-side to quickly see which emails get the best response. Once you know what appeals to your readers, you can refine your emails for even better results.