MSA SPF Policy Checks

It ocurred to me that it might be useful for an MSA to check and see if a 
message that is being submitted to it for transmission would pass an SPF 
check using the MSA's local IP address.  I'm trying this in Postfix 2.1.

I have the latest Mail:SPF:Query and postfix-SPF-policyd from Debian Testing 
installed and running.  I need to modify postfix-SPF-policyd to use the local 
IP address rather than the client IP address.  

So, what I need to do is insert one line of code here:

sub sender_permitted_from {
  local %_ = @_;
  my %attr = %{ $_{attr} };

.................................

  my $query = eval { new Mail::SPF::Query (ip    =>$attr{client_address},
                                           sender=>$attr{sender},
                                           helo  =>$attr{helo_name}) };

That line of code needs to change $attr{client_address} to the local IP 
address.  This would be a manual entry (or if there's an easy way to get the 
local IP address automagically be gotten that's fine too).

I assume that for anyone versed in PERL, this is trivial.  I'm not at all, so 
I was wondering if someone here could tell me what needs to be changed.

On a related note, I've started working on re-implementing postfix-SPF-policyd 
in Python.  If it were done in Python, then I'd know how to deal with it.

Thanks,

Scott K

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