Look for an email program

My original post was made in a rush. What I am looking for is an email program that will help with this project. I have a DQ owner in need of a marketing program. I'm looking into a fishbowl type program to aquire email addresses. On a weekly basis, I will send weekly discounts to the opt in list I will collect through the fish bowl similar to a lunch fax program but using email.

I don't see why this program wont work for multiple restaurants but would need a decent email manager to put it together. There are several people doing a similar program but on an individual restaurant basis. My program will take advantage of multiple restaurants (and fishbowls) in the same community so if a customer signs up at one restaurant, they will get food specials from all participating restaurants in one email that will probably also link to the website.

Any ideas or comments are appreciated.