Hey, I have a WordPress website that has about 8K email subscribers on FeedBurner. I do a couple of posts per day, but FeedBurner delivers these posts via email only once a day and that too, it's not immediate. I have to select a two hour time slot during which it delivers whenever it wants. (More often than not, it delivers towards the end of that two hour slot) I need another mechanism where the mail update is delivered right when I put up a post. I know of MailChimp, but it's not free once you have more than 2K subscribers. I also like the JetPack plugin, but the problem is that I cannot import the 8K subscribers I already have at FeedBurner. Please suggest something and I'd be grateful!