[opensuse] How to avoid duplicate large emails ?

I am looking for a system to avoid duplicate large emails! E.g.: Peter found a nice pps file and send it to a couple of friends. One of them send this email to a couple of others (well, not only others, I am included again), .... I get the same email then over the time 10 times! I am looking for a way that people can "upload" the so important information and only send info about a new file stored there (or just let each friend subscribe via RSS). Is something like that available or where to start? bye Ronald -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org