Obtaining the IMAP GUID from a sieve script

[Peter]

>> On 18 Jan 2021, at 04:12, Jochen Bern <Jochen.Bern at binect.de> wrote:
>>> (Also, you can legally have several e-mails with the same Message-ID in
>>> your mailbox; e.g., someone addressed it to two aliases that both expand
>>> to you, just to name one possibilty where *both* go through *sieve* as
>>> well.)
>>> On 18.01.21 12:18, @lbutlr wrote:
>> I delete duplicates before they are delivered to a mailbox.
 From using doveadm-deduplicate, I remember that with message-Id as 
criterion, it would delete too much for my taste, of what makes a duplicate.

-- 
peter