From: Wietse Venema (wietseporcupine.org)
Date: Wed Nov 02 2005 - 09:54:19 CST

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Robert Felber:
> On Wed, Nov 02, 2005 at 10:19:52AM -0500, Wietse Venema wrote:
> > > the heap in many ways. What's next for you?
> >
> > Adding anti-spam authentication,
>
> Anything in mind which will help against spam from ISPs like hotmail/msn/yahoo
> (which do have a hard job)?

Something like DKIM that authenticates the envelope sender domain.
Not: schemes that authenticate the path that the message takes.
In particular, not schemes that require MTAs to modify envelope
senders or to insert message headers when forwarding mail.

        Wietse

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