First, I know how to capture emails and send a "newsletter" based on my new posts to my subscribers. This is NOT my question. I want to do a 12 week newsletter (already written and ready to go) that will start and end according to when the person signs up to get the newsletter. So the newsletter would be staggered - not scheduled with each new post. How can I do this? Its a wordpress blog, so I'm willing to use wordpress plugins if needed, but from what I see, all the newsletter plugins are to send out automatically when you post something new, or you have to send out the newsletters manually. Thanks.
I think use need to use "broadcast", some autoresponder have schedule to send but some or not so you have to do manually.
You need to use a service like Constant Contact, Vertical Response or Mail Chimp or one of the others to create a newsletter campaign