On 11/24/2011 05:07 AM, Erik Jacobs wrote:
> Looking at doing a project and have played with Djigzo for a few
> hours (On CentOS5) and am trying to figure out if it will work for
> our needs.  It is not looking promising.  I'm using Thunderbird here
> in all cases.
>
> 1) I can't seem to figure out how to get every user's SMIME cert to
> every other user.  Example: I've created [email protected] and
> [email protected].  I created the internal CA, created a cert for both
> of them and imported it.  But, at that point, how do I send an
> encrypted message between Johnny and Sammy?  Without Sammy having
> Johnny's keys and vice-versa, there isn't a way to encrypt the
> outgoing message.  On the certificates page, there is an option to
> "download all keys."  But aren't these the private keys?  I wouldn't
> want every user to have every user's private keys.

If you select the certificates and click "download keys" it will
download the keys but if you select "download certificates" it will only
download the certificates (without the keys). All the certificates for 
all your internal users should be exchanged between clients. The easiest 
way to do this is by selecting all the certificates for your users, and 
then click "download certificates". This will give you a .p7b file 
containing all certificates. This .p7b file can then be imported into 
every desktop.

>
> 2) Is there any way to prevent Djigzo from DEcrypting incoming
> messages?

If all users are external users (the default), then no email will be
decrypted. Incoming email is split into two paths, for internal
recipients email will be decrypted, for external recipients email will
be encrypted. If you do not make any domain or user an internal user, no
email will be decrypted.

> Essentially, here's what I'm looking for: -- All messages in a user's
> mail folders are SMIME encrypted. -- Any incoming mail that is SMIME
> encrypted for that user passes  untouched.
> -- Any incoming mail that is unencrypted is encrypted by Djigzo
> using the user's own key. -- Any outgoing mail that is encrypted is
> untouched -- Any outgoing mail that is unencrypted is untouched.
>
> I think that Djigzo ends up being total overkill in this situation?

I have been thinking about such a use case as well because it can be
used to store all email encrypted in your local mailbox. This is kind of 
different from the typical use case of the Djigzo gateway. If you make 
sure that every user is an external user, this should work since all 
incoming email for some internal user will be encrypted if it is not 
already encrypted (if setup to encrypt all email for certain users).

How are your internal users going to send encrypted email to each other? 
Using the S/MIME functionality of the email client?

Kind regards,

Martijn Brinkers

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