Hi guys: I'm fresh at postfix. Resently, we have built the postfix for our web service. We would like to deliver some e-magzines to our registered users. but the size of each magzine is over 1 M. but we have hundreds of thousands users. As a result, the bandwidth is embarrassing. Since most of our users use yahoo, Hotmail and some other huge ISP, so if we can just send one copy to certain number of users of the same ISP, the bandwidth could be saved a lot. just let the ISP themselves to distribute the mails to those users. Is there some method to deal with this problem？or just some configuration change can do？
thanks a lot~
