dovecot sieve duplicates detection

[Stephan Bosch]

On 17/08/2018 09:14, Stephan Bosch wrote:
>
>
> Op 14/05/2018 om 23:03 schreef James Cassell:
>>
>> On Mon, May 14, 2018, at 4:52 PM, Stephan Bosch wrote:
>>>
>>> Op 25/04/2018 om 22:49 schreef James Cassell:
>>>> On Wed, Apr 25, 2018, at 3:20 PM, Stephan Bosch wrote:
>>>>> Specify the ID used for duplicate checking explicitly using the
>>>>> :uniqueid argument (https://tools.ietf.org/html/rfc7352#section-3.1).
>>>>> Using the variables extenion, compose the uniqueid from the 
>>>>> message-id
>>>>> and the mailbox name.
>>>>>
>>>> In my experience with dovecot's implementation, you can set the ID 
>>>> only once in a script.  If you try to filter duplicates based on 
>>>> multiple IDs, only the first (or last, I don't remember) takes effect.
>>>>
>>> Do you have a detailed example of the supposed wrong behavior?
>>>
>> I don't have them readily available. Basically, the result of the 
>> first duplicate test in a script is taken as the result of any future 
>> duplicate test, even if the parameters to that future duplicate test 
>> in the same script are different and would otherwise result in a 
>> different output. The duplicate test is only evaluated once and its 
>> results are substituted everywhere.
>>
>> For example, I might want to flag a message as a new conversation if 
>> I have not seen another message with the same subject. In the same 
>> script, I might want to discard messages that are exactly identical 
>> including message ID among others. The dovecot behavior would be to 
>> discard all messages that match a subject of previously received 
>> message.
>
> I finally managed to review this issue and I can confirm that this is 
> a bug.

Fix released in 2.3.9.

Regards,

Stephan.