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Subject: Re: Adding a disclaimer at the end of each message
From: Wietse Venema (wietseporcupine.org)
Date: Fri Jun 09 2000 - 09:19:30 CDT

> [Harrie] Right, so to your opinion the mail-application
> [Harrie] (client) is responsible for this task? (Adding
> [Harrie] a disclaimer). I'm asking because there are people
> [Harrie] at my site that also want to implement a site-wide
> [Harrie] disclaimer at the bottom of the messages.

Rather than saying it can't be done, let me offer an opportunity
to find out why.

You can experiment with the recent Postfix content filtering features
to add a line at the bottom of email. You will notice that it is
not effective for mail composed with a web browser. This might be
sufficient to convince people of the futility of the effort.

If you're more ambitious, drop in a MIME parser into the loop and
try adding the footer to all MIME multipart alternatives, using
the proper formats (quoted-printable, base64, html, whatever).
Watch people become upset because you ruin all digital signatures.

Robbing people from the possibility of sending authenticated email
may be another argument against adding disclaimers.

See the FILTER_README file in one of the most recent snapshot
releases, and follow the instructions for the simple filtering
approach. This will become part of the official release in July.

        Wietse