Huge project on Mass Mailing.... ready to pay up front

Hello... I am looking for someone who has the experience on sending mass mails to over 100k-300k per day. We need around 90% emails in the recipients inbox. We are ready to pay up front as because we want to help the provider as much as possible to get initial success on the project. Price for the project will be decided while starting to work with the project winner. Thanks... Keep bidding.