Hello. I have a list of about 100,000 potential clients for my web design business. I can get a new list of that many every few days. I'm wanting to somehow mass mail 25,000 per day. I have understand SPAM rules and as long as I have an opt-out link then I will not violate the rules. However, I need a service or method to send out the emails. I've looked at Mail Get, Mailchimp, Constant Contact, etc., but I feel like I'm missing something like a better alternative. Does anyone know of a service or method to send out these emails?