In e-commerce world, due to lot of competition, it has become compulsory to interact with your customers on regular basis. Follow Up Email is a powerful auto-responder and customer relationship tool that helps to keep your site in the customer's mind always.
For example you want to send an automated email to customer :
1) For 10% discount on his/her birthday.
2) Product reviews after order is complete.
3) Send an offer in case of abandoned cart.
4) Delay in shipping due to bad weather etc…
You can read more about this extension from here.
Recently, I have integrated this extension in one of my project. Due to well written documentation it has become very easy to implement it and would like to recommend it as well.
Thanks!!!!!!!!!! Enjoy Programming :)