If I understand your question correctly, you need a marketing automation platform that lets you send mass emails, nurture contacts and engage in progressive profiling so you can get to know them better and tailor communications towards their interests or behaviors.

If I got that right, I recommend Hubspot or Pardot. I used to be a Pardot reseller and now I am a Hubspot partner (full disclosure) but both platforms have a ton of advantages that ease the marketing process. Hubspot also has it's own lean CRM but both platforms can sync with traditional CRMs as well. There are other platforms, but most of the others are complex systems that I don't believe are well suited for smaller organizations.

If I understood your question, I'm happy to talk more about how these platforms could benefit you.