Zitat von IT geek 31 <itgee...@googlemail.com>:
On 6 January 2011 19:49, Jerry <postfix-u...@seibercom.net> wrote:On Thu, 6 Jan 2011 19:21:56 +0000 IT geek 31 <itgee...@googlemail.com> articulated:I think you've nailed it there Tom - I'm trying to teach better etiquette. Ideally I'd like a plugin for his mail client (Outlook) that automatically detects the recipient (me) and encrypts the mail, but I have been unavailable to find one.I am not near a Windows machine presently; however, I believe that Outlook, at least the newer versions, had a setting that forced use of S/MIME. This is not really a Postfix problem though. You might be better served on an Outlook forum. -- Jerry ✌ postfix-u...@seibercom.net _____________________________________________________________________ TO REPORT A PROBLEM see http://www.postfix.org/DEBUG_README.html#mail TO (UN)SUBSCRIBE see http://www.postfix.org/lists.htmlOutlook is all-or-nothing - it can force encryption for all recipients, regardless if they have a certificate or not, or none at all. AFAIK, it has no way of determining if a recipient has a certificate and if so forcing encryption. Regardless, I'm after a Postfix solution as that would educate (for want of a better word) all senders, regardless of client.
If you really like to do you might use header_checks to detect the Content-Type. Signed mail for example has "Content-Type: multipart/signed". For header_checks have a look here http://www.postfix.org/header_checks.5.html, but be aware that the content has already leaked as others said. If you need policy drive encryption use a S/MIME gateway (http://www.postfix.org/addon.html#security-gateway) or plugins for the mailclient in question.
Regards Andreas
smime.p7s
Description: S/MIME Cryptographic Signature
