How to send 50k emails

HI
I want to send an email campaign to 50k contacts, how can I do this?
I tried mailchimp and more services, they suspended my account after I upload the list.
I try amazon but my account still on a sandbox, I don't know when they gonna read my request.

I don't know about a free way to do it but there is a paid way maybe look into floodcrm Use it at your own risk