My concern is to be back into email marketing I used to manage 2 growing lists (15000 members each list) and I did stop email marketing as I had more and more problems to send it with Mailboy software I do not want to use a company like Aweber because they will require a new optin process to import my current lists and I think I will lose many subscribers Do you know any good email marketing company like Aweber BUT not requiring a new optin process?