Hello, I can support your need you have without any problem, we can do two possible things if you want to leave a default by you or a given for us mail email , we have no problem marked as spam , by our capacity for sending emails electronic can give a rate of 5,000 a day or more according to your demand , give statistics as emails were sent , which were received , how no, that mails are receiving them , we are also implementing a new system to know how many people open the mail to read it, if you like and you haceptas this first step, for a next month we can handle a cost per volume and add the cost of design created , creating an average volume over a defined number of designs , if you will write me , greetings .