Wow, I had a feeling I was opening a can of worms here.  This is one area
where I really feel the SA documentation could benefit by having some real
world examples.

Right now I am just going with the one internal_networks set to the ip of my
SA server.  I'm not setting any trusted_networks.  I figure there's no harm
in not trusting anyone, right?  Just a few extra CPU cycles while SA checks
out all the IP addresses in the email.  Or is there more impact than just
that?

Skip


RW-15 wrote:
> 
> On Sun, 12 Jul 2009 17:29:07 +0200 (CEST)
> "Benny Pedersen" <m...@junc.org> wrote:
> 
>> 
>> On Sun, July 12, 2009 16:21, RW wrote:
>> > Generally forwarders should go into your internal networks,
>> 
>> no no, internal networks is your own wan ips nothing more, imho
>> 
>> forwarders is trusted/msa
> 
> If you do it that way SPF, XBL, DUL  etc run against a server that's
> inside your trusted network and not against the responsible IP address.
> 
> 
>> > unless they rewrite the return-path
>> 
>> why does this change ?
> 
> Ideally you want SPF to run against the IP address that delivered to
> first MX server; and unless that MX server adds usable SPF headers, you
> need to put it into the internal network. If the forwarding server
> does Sender Rewriting, SA may not be able to get the original smtp
> "mail from" address, and you may want to use the trusted network
> instead to run SPF against the rewritten address.
> 
> 

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