You would need a custom setup for this: SMTP server (e.g. GMass SMTP, Amazon SES) + An email sender (e.g Atomic, Mautic etc) hosted on your server. It's a technical configuration process. You also have to configure DNS properties about emailing (SPF, MX records, DKIM, Dmarc). Not just that.. you have to warm up your list and IP before you start sending in your desired huge volumes.
And hey, it's not just about the tools, but also about your sale copy to help with the open ratio.
Can't do it yourself? Simply post your requirements in Hire a Freelancer thread of this Forum. Goodluck!