dovecot - Jul 2019 - Sieve problem with duplicate and fileinto in the same set of rules

Hi there,

on my mail server (postfix, dovecot 2.2.27 in Debian 9) I have an automatic
forwarding (with sender_bcc_maps in Postfix) for all the emails sent in smtp
from the same server, that are then put in the Sent folder with a sieve
rule.

 

In this way, however, when a user sends an e-mail to himself, both copies
end up in the Sent folder and it's not good.

 

To resolve, I tried using the Sieve "duplicate" extension along with
"fileinto" but I can't get it to work.

 

I then activated also the "editheader" extension to better understand
what
the problem was and I get these results.

 

Sieve rules without using "fileinto:"

 

require ["duplicate", "editheader"];

if duplicate { 

addheader "x-sieve-test1" "duplicate"; 

}

if allof (header :regex ["from"] [".*info at example\.com"],

header :regex ["x-sieve-test1"] [".*duplicate"]) { 

addheader "x-sieve-test2" "confirm duplicate"; 

stop; 

} elsif header :regex ["from"] [".*info at example\.com"] { 

addheader "x-sieve-test3" "not duplicate"; 

stop;

}              

 

and I get these headers in the first mail (in INBOX):

X-Sieve-Test2: confirm duplicate

X-Sieve-Test1: duplicate

 

and in the second email (always in INBOX) this other:

X-Sieve-Test3: not duplicate

 

Everything works perfectly.

 

When I add the fileinto statement to the last if as below

 

require ["duplicate", "editheader"];

if duplicate { 

addheader "x-sieve-test1" "duplicate"; 

}

if allof (header :regex ["from"] [".*info at example\.com"],

header :regex ["x-sieve-test1"] [".*duplicate"]) { 

addheader "x-sieve-test2" "confirm duplicate"; 

stop; 

} elsif header :regex ["from"] [".*info at example\.com"] { 

addheader "x-sieve-test3" "not duplicate"; 

fileinto "Sent";

stop;

}

 

I get a completely incorrect result, both mails in the Sent folder with this
header line:

X-Sieve-Test3: not duplicate

 

in practice it no longer detects the duplicate email.

 

If I use "discard" rather than "fileinto" it works fine and
if I put
"fileinto" in the first "if" ("if duplicate") it
does't work.

 

I did hundreds of tests but the "duplicate" extension stops working in
the
presence of the fileinto statement (there are exceptions: if I put the
"fileinto" in the second "if" - that is in the middle one
instead of the
last one - it works fine, but it's not that that I want).

 

Any idea how to solve the problem or how to get the same result (one mail in
Sent folder and one in INBOX, when a user sends an e-mail to himself)
without using the "duplicate" extension?

 

Thanks a lot,

Luca

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Il 15/07/19 14:34, Gianluca Scaglia via dovecot ha
scritto:
>
> Hi there,
>
> on my mail server (postfix, dovecot 2.2.27 in Debian 9) I have an 
> automatic forwarding (with sender_bcc_maps in Postfix) for all the 
> emails sent in smtp from the same server, that are then put in the 
> Sent folder with a sieve rule.
>
> In this way, however, when a user sends an e-mail to himself, both 
> copies end up in the Sent folder and it's not good.
>
> To resolve, I tried using the Sieve ?duplicate? extension along with 
> ?fileinto? but I can't get it to work.
>
I solved the problem of duplicated email with this Sieve rule:

require ["duplicate", "fileinto", "mailbox"];

if duplicate :seconds 60 {
 ??? fileinto "Trash";
}

Hope this can hel you.

Ciao

-- 
Alessio Cecchi
Postmaster @ http://www.qboxmail.it
https://www.linkedin.com/in/alessice

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