shared folder name or public folder with mail address

[Tobias Kirchhofer]

On 15 Feb 2020, at 10:43, Armin Schindler wrote:

> On 14.02.2020 11:44, Tobias Kirchhofer wrote:
>> On 14 Feb 2020, at 11:06, Armin Schindler wrote:
> ...
>>
>> The sorting in the according public folder happens in a global sieve
>> script before user scripts are fireing. It is combined with the 
>> ‚+‘
>> notation in postfix for sub addresses and an special ‚listadm‘ 
>> user
>>
>> postfix:
>> |
>> listadm+Verteiler/info@$DOMAIN
>> |
>>
>> The sieve script is then reading the generated address and delivers 
>> it
>> into the according public folder. We learned a lot about sieve 
>> scripting
>> with this task :-)
>>
>> |sieve_before = /var/vmail/sieve/global/global-before.sieve […] |
>>
>> More details would be to much here.
>>
>> To be honest, we needed some time to get it done properly. It is a
>> combination of features and A LOT OF testing and analysing the 
>> behaviour
>> of postfix/dovecot/public-folder/sieve/acl.
>
> the sieve part seems to be very tricky.
> My test is now working with a public folder and I have a
> "sieve_before" script in place which works for rules of the
> private namespace.
>
> But when the rule shall "fileinto" a public folder, the mail isn't
> filtered (moved) and syslog says
> dovecot: lmtp(.): Error ... sieve...: Mailbox doesn't exist.
>
> After some tests I found out it always looks in the private (or 
> shared)
> namespace for that specfied folder.
> Do I miss a config option to let dovecot sieve "fileinto" a public
> namespace folder?
> I use dovecot version 2.2.13.

We „fileinto“ in this manner :

```
fileinto „Namespace/folder“;
```

The procedure in our setup is like this:

1. Virtual alias for each public-Folder email address within postfix:

Pattern:
folder at domain.tld listadm+Namespace/folder at domain.tld
Example:
info at domain.tld listadm+Verteiler/info at domain.tld

Verteiler is the namespace, info the mailbox. listadm is a pseudo user 
in this context which holds the ACL for fileinto the resulting mailbox 
with proper permissions.

2. Disassemble the virtual alias address with sieve:

Excerpt of the script. It is actually more code because we sort out spam 
for public folder. German comments, sorry.

```
         # Hat Subadresse?
         if envelope :matches :detail "to" "*"
         {
                 # Adressaufbau: listadm+Namespace/liste@
                 # ${liste} wird Namespace/box
                 set "liste" "${1}";
         }
[…]

                 fileinto "${liste}";

```

I can send you the whole script if you need.

Greetings!

Tobias

-- 
collect at shift.agency
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