On Tue, Nov 26, 2019, at 5:13 AM, Claudio Corvino via dovecot wrote:
>
> Hi everyone,
>
> we have a duplicate e-mail problem with Dovecot 2.2.13 (LMTP as MDA) on
> a Debian 8 server.
>
> Our users are on external LDAP.
>
> We just need to setup a vacation responder (with Sieve) for our
> employees with a redirect to an alias (a distribution list), let's call
> it *l...@domain.com*, that comprehends even the user that just
> activated the out of office.
>
> This generates a loop: when someone write to l...@domain.com every user
> of the aforementioned distribution list receives a duplicate e-mail
> generated from the sieve script of the user with vacation responder
> active that contains the redirect to l...@domain.com.
>
> We just tried activating the duplicate extension into sieve script but
> the redirected e-mail has a different MSG-ID and it's not recognized as
> a duplicate by the server.
>
> Our dovecot conf is:
>
[snip]
> An example of user sieve script is:
>
> *require ["vnd.dovecot.duplicate","copy","fileinto","vacation-seconds"];
> # rule:[Outofoffice]
> if true
> {
> vacation :addresses "xxxx...@domain.tld" :subject "Automatic Reply" text:
> *
>
> *<Text here>
> .
> ;
> fileinto "INBOX";*
>
> * redirect "l...@domain.com";*
>
> *}*
>
You've not used the duplicate test anywhere in your example. See the RFC for
examples:
https://tools.ietf.org/html/rfc7352#section-5
Specifically, example 3 might help:
https://tools.ietf.org/html/rfc7352#section-5.3
but most simply, you can probably replace `if true` with `if not duplicate`
V/r,
James Cassell
