[Mimedefang] Boilerplate on outgoing mail ... with multiple servers

[Ed Holden]

Hi.  I've just implemented MIMEDefang 2.31 to satisfy my company's lawyers
by adding a boilerplate disclaimer to all outgoing mail.  (Yes, I hate the
plan, but I like MIMEDefang.)

The filter should add the boilerplate to our outgoing mail ... in theory.
The problem is that the boilerplate is *also* added to mail sent between
local users.  And to add another wrench to the gears: we have three mail
servers on our network.  Any of those servers counts as a "local" host, so
the boilerplate gets appended twice to messages sent between servers - once
as it leaves a MIMEDefang-enabled server, and once on its way *into* the
next server (under the assumption that the message is coming from a local
user, when it's actually coming from another server).  So I'd like to find a
way to avoid adding the boilerplate when (a) the message is intended for a
local user, and (b) when it is intended for a user on another local server.

The boilerplate works using the following text in mimedefang-filter:
_____________________________________________________________
 sub filter_end ($) {
    my($entity) = @_;

    return if message_rejected();

    my($textboilerplate) = "\nBoilerplate";
    my($htmlboilerplate) = "\n<p><small>Boilerplate</small>";

    if ($RelayAddr =~ "^10\.0\.") {
      append_text_boilerplate($entity,$textboilerplate, "0");
      append_html_boilerplate($entity,$htmlboilerplate, "0");
    }
 }
_____________________________________________________________

As you can see our local IPs are all 10.0.0.0/16.  Our Perl guru wasn't able
to puzzle it out (though he did get me interested in learning Perl).  Can
anyone help modify this filter?

Regards,
Ed



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