What is your Emailing List Growth Process?

Hi folks,

This post might rather be directed to freelancers or entrepreneurs that are trying to grow an audience and/or sell digital products.

After hearing so many times that it is essential to grow your own listing of emails from people in your audience or potential prospects, I decided to start looking at the different tools and processes.
There are many tools out there, the ones that got many praises seemed mostly to be: ActiveCampaign, GetResponse, ConvertKit.
And if you are just starting, a combination of MailChimp+Hubspot seems enough initially.

So this got me questionning:

• What is the most recommended, having a specific emailing service + a specific CRM OR a tool that does both Emailing+CRM (ActiveCampaign seems to be doing both)?
• And most importantly, what is your overall process? To be more specific, imagine you have on your website, a page to capture emails to sign up to a newsletter, and on another part of your website, a page for a lead magnet about a specific topic (like Growth Hacking) that will allow you to capture also emails. Then, in your CRM, how do you differentiate these different users/emails ?

My overall concern is I don't want to bombard someone with 3 different emails in the same day so I want to make sure I keep a constant eye on who received what email.

Thanks a lot,