Deliver same E-Mail in same Mailbox only once ?

[Stephan Bosch]

Op 4/20/2016 om 7:31 PM schreef Heiko Schlittermann:
> Hi,
>
> Thomas Leuxner <tlx at leuxner.net> (Mi 20 Apr 2016 11:04:22 CEST):
>> * Christoph Adomeit <Christoph.Adomeit at gatworks.de> 2016.04.20 10:29:
>>
>>> Is there a way to deliver  the same Mail in the same Mailbox only once ?
>> Yes this case is supported via an sieve extension:
>> require ["duplicate"];
>>
>>
>> #Deduplicate mails sent to aliases for same mailbox using the msgid
>> if duplicate {
>>       discard;
>> }
> I wouldn't do that. Message with the same message id doesn't need to be
> duplicates. See the difference between this message (I put you on BCC),
> you'll receive it via the mailing list AND directly. Depending on the ML
> configuration the messages are NOT identical.

The "duplicate" test allows more complex arguments to handle such
concerns. This way, for example, the list-id header (if present) can
also be part of the unique ID used for duplicate tracking.

https://tools.ietf.org/html/rfc7352#section-3.1

Regards,

Stephan.