250k users mailing list

Hi, we have a customer that we manage its mailman mailing lists for lots of years. We do have our own virtualized servers and want to use our own resources to build cheap service. Now they started a new project and they provided me with 3 lists in excel with 80.000, 130.000 and 40.000 users. Obviously, we won't do this in the regular cPanel hosting, and we're looking for a very expertise tech to help us to develop any mail servers or resources needed to make this lists and send this emails without being banned all the IPs used for sending email. Also we will need to include the "unsubscribe link" in the bottom of the email. Thanks