Newsletter delivery system

Hello, I have installed RSS Multi Impoter Plugin to build newsletter site by category pages. I am trying to find a plugin, that can send a daily list of new postings on my pages to my email list.
Which plugin can I use to incorporate with RSS Multi Importer plugin, to do the job, and how to put this together? Would mailchimp.com, activecampaign.com or contactus.com have tools to do this, or is there a better system for this kind of program? Thank you for any help..