Re: [exim] Storing messages in Maildir format with symmetric…

Hey Jasen,

ok, I ended up with $local_part_data which is also used for determining
the folder structure when using Maildir.

Best regards,
Gabriel


Am 2022-12-11 03:43, schrieb Jasen Betts via Exim-users:
> On 2022-12-11, Dengler, Gabriel via Exim-users <exim-users@???>
> wrote:
>> Hey Heiko,
>>
>> in the meantime, I made great progress with the "transport_filter"
>> tool.
>> That was exactly what I was looking for.
>>
>> In the current setup, I want to store a public and a private key for
>> each user, whereas the private key is encrypted by a password that is
>> only known by the user. For incoming messages, I use the public key to
>> encrypt them, for accessing those messages you need the private key,
>> respectively.
>>
>> As mentioned in the documentation [1], you can use expansion variables
>> to pass to the "transport_filter". Is there an easy way to access the
>> user name or do you have to filter it out of the headers, e.g. by
>> accessing "Envelope-to:"? I thought about $recipients [2], but this is
>> not available for "transport_filter".
>
> You can save $recipients into an $acl_m_ variable in the data
> acl and thus have the value available when doing delivery, but how
> will that help? - recipients may be multiple...
>
>
> When encrypting you need a single. if it's handling a single recipinet
> you get you get $domain ansd $local_part which are probably what you
> want. They're tainted so use them in a lookup to find the public key
> (or the filename). some transports can handle muiltipe recipients in
> a single transaction. they'll need to be configured to not attempt
> that.
>
> --
> Jasen.