To this point, I have personally tried ConstantContact, IContact, MailChimp, and AWeber. I encourage you to share your own experiences, questions, suggestions, and comments below. And if you’ve found this helpful, I’d appreciate if you would “like” it below and share it freely.
You are correct. Autoresponders are a complicated service so it is advisable to work with companies that specialize in that (like Aweber or MailChimp).