There are many ezine and newsletter list managers and I have explored many, both hosted accounts and software to install on my own server. What I am looking for is a list that will allow me to create several mailings that will then be mailed to the person who joined one per week, or two weeks, or month (or whatever) until such time as there are none left and then stop.

What I'm trying to do here is create something like a class where the subscribers would get an email on a different topic each week and each topic would build upon the last. Thus, the traditional ezine setup wouldn't work for me because people who signed up later would miss the earlier information. Many allow a deferred option, so I can say send on this date, but that's not what I need either.

I hope that makes sense.

Anyway, does anyone have recommendations for either software or a service that can do this for me? Thanks.