I need to implement a professional service for mailings that do not pay for sent emails, just based on server purchased. The planned number of sent emails: eg. A day can be 200 000 - 500 000 per day, and month to 1 000 000 - 3 000 0000 or more. It is important to be able to automate as much as possible, ideally as marketing automation. The price offered can change, I expect to send offers. If you are interesting professionalism solutions are the price we can negotiate.