Email Marketing - Could it be better?

Hey all, I am in the process of building an email marketing software that allows you to send practically unlimited emails with unlimited contacts monthly, for one affordable price, no add-ons, everything included and a built in CRM with SMS features as well. Here's the thing, most don't know that when you start emailing a list, you're likely going to get blacklisted by sending to thousands or even hundreds of emails per day. Your email needs to be warmed up and increase its sending limits day by day. I have been working with programers/coders to help me with this project, because I ran into the issue of my emails going to spam right away. It's not a good look, when you call a prospect and you tell them to check the spam folder for your email... I've been using the software myself, and it's been amazing. I will publish the features and everything soon, but just curious to see how email marketing has been working for everyone. if you currently use a platform like mailchimp, is it effective. how many emails do you send per month, how many contacts do you have, and is it working with your budget. Any feedback is helpful