I have been working on a similar project for a tech company. Actually, I do it daily :)
I am new to freelancer platform but have massive experience and knowledge for helping you in Email Marketing. I need to discuss if you have already purchased mail sending service. If you have more than 1k subscribers to send emails, we may need to purchase the service. Generally, under 1k it is free. Or else, we can send emails in batches!
I do it daily for my employer. I can do it for you as well.