Re: SRS implemenation in sendmail

>My page also reads:
>
>"You could certainly put a front-end Milter at the gate. Especially so, if
>you wish to implement the above outlined "empty envelope-from + no SRS
>signed recipient + DATA phase" anti-spammer policy. But that falls outside
>the scope of this document, which is to integrate SRS functionality into
>sendmail."

My apologies.  I did not read that part, I was only scanning for the 
"meat".  When I saw that example SMTP transaction bit at the top, I assumed 
that was included in the scope.

>I will see about adding a script that actually does implement the outlined
>anti-spammer policy. Though I doubt the DATA phase can actually be
>circumvented from sendmail.cf.

I think it could be as easy as eliminating the is_srs macro, _always_ call 
reverse_srs program, and include in its arg list both the recipient address 
and the sender envelope.  What I don't see is the purpose of

} elsif ($use_address =~ /^\|/) {
     print "\"$old_address\"\n";

in that script.  Also, if we send $f to srs2envtol.pl does it include the 
brackets <> ?  I could experiment but if someone already has a test 
environment set up, it would save me the trouble for one little test..  :)


sendmail.cf:
---------------------------------------------------------
SParseLocal=98

# always call reverse_srs
R$*                             $@ $(reverse_srs $1 $f $)
---------------------------------------------------------


patch srs2envtol.pl:

--- srs2envtol.pl       2004-05-24 14:28:24.000000000 -0700
+++ srs2envto2.pl       2004-05-25 10:24:23.000000000 -0700
@@ -29,5 +29,6 @@

  my $old_address = $ARGV[0];
+my $envelope_sender = $ARGV[1];
  my $use_address;
  my $srs = new Mail::SRS (Secret => $secret, HashLength => 8, 
AlwaysRewrite => 1);
@@ -58,4 +59,7 @@
      print "\"$old_address\"\n";
  } else {
+    if (length($envelope_sender)==0) {
+      $old_address = "/dev/null";
+    }
      print "$old_address\n";
  }





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    Tom Lahti
    Tx3 Online Services

    (888)4-TX3-SVC (489-3782)
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