Sv: Avoid duplicate emails in the sent folder

[Sebastian]

I have a sieve filter called "sent.sieve"

Where I just do this:
discard;

Then in sieve settings:

plugin {
  sieve_plugins = sieve_imapsieve sieve_extprograms
  sieve_global_extensions = +vnd.dovecot.execute
  sieve_execute_bin_dir = /usr/bin/
  imapsieve_mailbox2_name = Sent
  imapsieve_mailbox2_causes = APPEND
  imapsieve_mailbox2_before = file:/etc/dovecot/sieve/sent.sieve
  imapsieve_expunge_discarded=yes
}


And then in Exim4 SMTP server:


sentfolder.filter:
if $sender_address_domain is sebbe.eu then
unseen save /var/mail/asterisk2/Sent
endif

in exim4 config:
system_filter = /etc/exim4/sentfolder.filter
system_filter_file_transport = sentfolder

in transports of exim4.conf:

sentfolder:
  debug_print = "T: Sentfolder for $local_part@$domain"
  headers_add = Status: RO
  headers_remove = x-dkim-signature
  headers_remove = x-spf-signature
  headers_remove = x-trusted-domain
  headers_remove = keywords
  headers_remove = x-priority
  headers_remove = x-status
  driver = appendfile
  delivery_date_add
  envelope_to_add
  return_path_add
  use_flock_lock = yes
  use_fcntl_lock = no
  use_lockfile = no
  group = mail
  mode = 0777
  mode_fail_narrower = false
  current_directory = /



that should solve it.

-----Ursprungligt meddelande-----
Från: dovecot-bounces at dovecot.org <dovecot-bounces at dovecot.org> För André Rodier
Skickat: den 4 april 2021 12:48
Till: dovecot at dovecot.org
Kopia: users at sogo.nu
Ämne: Avoid duplicate emails in the sent folder

Hello,

I have a webmail program, that I cannot configure to not save sent emails in the Sent folder. My emails to the SOGo team don't seem to reach the mailing list anymore.

So, I have no other choice to think the problem differently, and _maybe_ use Dovecot to fix this issue. Moreover, I think this could be useful for other email clients.

First, I have tried to use Sieve, but no success so far:

------
imapsieve_mailbox4_name = *
  imapsieve_mailbox4_from = Sent
  imapsieve_mailbox4_causes = APPEND, COPY
  imapsieve_mailbox4_after = file:/var/lib/dovecot/sieve/sent- checks.sieve
------

And this sieve script:

------
Message-ID header.
require [
  "variables",
  "environment",
  "duplicate",
  "imapsieve"
];

[…]

if duplicate :seconds 10 {
   discard;
}
------

Otherwise, can I configure dovecot in a certain way, for instance create a virtual Sent folder. This would not save the email when appended, but still returns the list of sent emails ?

But this is not working. Any idea?

Thanks for your help!

André


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