Deliver same E-Mail in same Mailbox only once ?

Thomas Leuxner tlx at
Wed Apr 20 09:04:22 UTC 2016

* Christoph Adomeit <Christoph.Adomeit at> 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 {
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