Postfix, always send as HTML
At my company we add a HTML disclaimer to every outgoing email. We use Zarafa and Thunderbird as mail-clients. In Zarafa I can set the parameter to always send email as HTML.
In Thunderbird, this is also possible with the addon "Stationary". All email are now also send in HTML by default in Thunderbird and it will add my disclaimer via Altermime and Postfix.
Now the problem arise, that I have to install 50 addons in Thunderbird on 50 clients to be able to get our HTML disclaimer added to the email and visible when the receiving party opens the mail we've send.
I've wonder if it is possible to let Postfix convert the email to HTML, even if it send as plain-text, so our disclaimer is always be added to the email. Also when we've send the mail in plain-text.?