From: Barry Irwin (bvilair.moria.org)
Date: Wed May 02 2007 - 02:08:39 CDT

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Magnus Bäck wrote:
> On Wednesday, May 02, 2007 at 04:21 CEST,
> Paul Bruce <admincais.com.au> wrote:
>
>> Is it possible to implement some simple encryption with Postfix ?
>>
>> Im trying to automatically encrypt any mail addressed to a particular
>> domain. All mail, regardless of the destination, is then sent off to
>> another mail server.
>>
>> The email client then downloads the email normally , and applies a
>> decryption plugin.
>>
>> The reason why I want this method over a digital certificate system is
>> that I need a great deal of flexibility and I do not want to be locked
>> into users having digital certificates.
>>
>> I also need an auomatic system, so that all email, is always encrypted
>> when sent to a certain domain, and does not rely on the user selecting
>> "encrypt" and so on.
>
> This is certainly possible, but it sounds like an awful kludge.
> It will require that you write the plugin for the MUA as well
> as a content filter for Postfix that will encrypt the messages.
>
> What actual problem are you trying to solve?
>

Would mandatory TLS to the remote domain server not serve your purpose,
or are you requiring that the messages actually be encrypted while in
the queue/spool/on disk ?

Barry

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