[Dovecot] Sieve is not getting the propper RCPT from the LMTP daemon

[klondike]

Hi!

Since the setup I use is a bit strange let's go for it first:
* The system uses postfix as MTA and dovecot as LDA after alias
translation by local via LMTP
* The dovecot version is 2.2.5 and the pigeonhole version is 0.4.1
* The SMTP server at gentoo.org is configured to send me a backup of my
emails to klondike+gentoo (at) xiscosoft.es using sendmail
* The email is received by the server and then (hopefully filtered).
* The email comes with two Delivered-To: headers, the first one has the
correct address, the second one has the gentoo address.

The interesting part of the filter is this:
if  envelope :detail "to" "gentoo"
{
 addflag "\\Seen";
 fileinto "gentoo";
 stop;
}

But this doesn't seem to work, I enable debugging with the following lines:
require "vnd.dovecot.debug";
require "envelope";
require "variables";

if envelope :matches "to" "*" { debug_log "envelope to `${1}'"; }
if envelope :matches "from" "*" { debug_log "envelope from `${1}'"; }

The relevant lines for the test e-mail I sent are these:
sieve: info: started log at Dec 24 13:37:23.
main script: line 9: info: DEBUG: envelope to `klondike (at) gentoo.org'.
main script: line 10: info: DEBUG: envelope from `klondike (at) gentoo.org'.
info: msgid=<52B97FF7.6050109 at gentoo.org>: stored mail into mailbox 'INBOX'.

The thing is that the to envelope should be instead klondike+gentoo (at)
xiscosoft.es as show by the lmtp logs:
Dec 24 13:37:23 localhost dovecot: lmtp(26249): Connect from local
Dec 24 13:37:23 localhost dovecot: lmtp(26249, klondike):
Cd6YHwOAuVKJZgAA0J78UA: sieve: msgid=<52B97FF7.6050109 at gentoo.org>:
stored mail into mailbox 'INBOX'
Dec 24 13:37:23 localhost dovecot: lmtp(26249): Disconnect from local:
Successful quit
Dec 24 13:37:23 localhost postfix/lmtp[26248]: 657D9101E5E:
to=<klondike+gentoo (at) xiscosoft.es>,
relay=xiscosoft.net[private/dovecot-lmtp], delay=0.29,
delays=0.05/0.03/0.03/0.18, dsn=2.0.0, status=sent (250 2.0.0
<klondike+gentoo (at) xiscosoft.es> Cd6YHwOAuVKJZgAA0J78UA Saved)

I really have no idea of why sieve is behaving like this as the evelope
address is sent properly by postfix's lmtp according to the logs. Any ideas?

klondike

PS: please do CC me when answering this e-mail as I'm not subscribed to
the list yet

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