Re: Re: Bug#257644: ITP: libspf2 -- Sender Policy Framework library, written in C
On Mon, 05 Jul 2004 12:51:47 +0200, Josselin Mouette <joss@debian.org> wrote:
> Nothing to do with the library, but I'm trying to understand the
> protocol itself. If I understand correctly, the SPF prevents any email
> from being sent outside the corresponding IP addresses of the sender's
> domain. Am I wrong?
My understanding is that SPF says "these are valid outbound relays for
this IP block"; a receiving SMTP server outside a.b.c.d/netmask, then,
only needs to check whether a.b.c.d is a valid relay for
a.b.c.d/netmask to decide whether or not to accept mail from that IP.
Chris
--
Chris Lawrence - http://blog.lordsutch.com/
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