* shawn D.Wang <[EMAIL PROTECTED]>:
> 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.

Yes.

> 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.

Do you use single recipient or multi recipient mails?

> 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?

Use multi recipient mails!

-- 
Ralf Hildebrandt ([EMAIL PROTECTED])          [EMAIL PROTECTED]
Postfix - Einrichtung, Betrieb und Wartung       Tel. +49 (0)30-450 570-155
http://www.arschkrebs.de                              I'm looking for a job
Yes, and every single administrator that's configured their virus
scanner to bounce to envelope deserves a swift kick upside the head.

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