Pigeonhole Sieve Interpreter
============================

The <Pigeonhole project> [Pigeonhole.txt] provides Sieve support as a plugin
for Dovecot's <Local Delivery Agent (LDA)> [LDA.txt] and also for its
<LMTP.txt> service. The plugin implements a Sieve [http://www.sieve.info]
interpreter, which filters incoming messages using a script specified in the
Sieve language (RFC 5228 [http://tools.ietf.org/html/rfc5228/]). The Sieve
script is provided by the user and, using that Sieve script, the user can
customize how incoming messages are handled. Messages can be delivered to
specific folders, forwarded, rejected, discarded, etc.

Configuration and Use
---------------------

 * <Download and Installation> [Pigeonhole.Installation.txt]
 * <Sieve Interpreter Configuration> [Pigeonhole.Sieve.Configuration.txt]
 * <Sieve Usage Information> [Pigeonhole.Sieve.Usage.txt]
 * <Sieve Script Examples> [Pigeonhole.Sieve.Examples.txt]
 * <Sieve Interpreter Plugins> [Pigeonhole.Sieve.Plugins.txt]
 * <Sieve Troubleshooting> [Pigeonhole.Sieve.Troubleshooting.txt]

Supported Features
------------------

Sieve language has various extensions. You can find more information about the
extensions from the Sieve Mail Filtering Language Charter
[http://www.ietf.org/html.charters/sieve-charter.html] or the Sieve.info wiki
page [http://www.sieve.info/].

Note that Sieve doesn't support running external programs.

The Pigeonhole Sieve interpreter recognizes the following Sieve extensions:

 *
+-----------------------------------------------------------------+--------------+----------------+
| *Extension*                                                     | *Support     | *Purpose*      |
|                                                                 | Status*      |                |
+-----------------------------------------------------------------+--------------+----------------+
| fileinto [http://tools.ietf.org/html/rfc5228#section-4.1]       | supported    | Allows storing |
|                                                                 |              | messages in    |
|                                                                 |              | folders other  |
|                                                                 |              | than INBOX     |
+-----------------------------------------------------------------+--------------+----------------+
| envelope [http://tools.ietf.org/html/rfc5228#section-5.4]       | supported    | Allows         |
|                                                                 |              | evaluating     |
|                                                                 |              | envelope parts,|
|                                                                 |              | i.e. sender and|
|                                                                 |              | recipient      |
+-----------------------------------------------------------------+--------------+----------------+
| encoded-character                                               | supported    | Allows encoding|
| [http://tools.ietf.org/html/rfc5228#section-2.4.2.4]            |              | special        |
|                                                                 |              | characters     |
|                                                                 |              | numerically    |
+-----------------------------------------------------------------+--------------+----------------+
| copy [http://tools.ietf.org/html/rfc3894/]                      | supported    | Allows storing |
|                                                                 |              | and forwarding |
|                                                                 |              | messages       |
|                                                                 |              | without        |
|                                                                 |              | canceling the  |
|                                                                 |              | implicit keep  |
+-----------------------------------------------------------------+--------------+----------------+
| body [http://tools.ietf.org/html/rfc5173/]                      | supported    | Allows         |
|                                                                 |              | evaluating the |
|                                                                 |              | body of a      |
|                                                                 |              | message        |
+-----------------------------------------------------------------+--------------+----------------+
| variables [http://tools.ietf.org/html/rfc5229/]                 | supported    | Adds variables |
|                                                                 |              | support to the |
|                                                                 |              | language       |
+-----------------------------------------------------------------+--------------+----------------+
| vacation [http://tools.ietf.org/html/rfc5230/]                  | supported    | Provides       |
|                                                                 |              | auto-responder |
|                                                                 |              | functionality, |
|                                                                 |              | e.g. for when  |
|                                                                 |              | the user is on |
|                                                                 |              | vacation       |
+-----------------------------------------------------------------+--------------+----------------+
| relational [http://tools.ietf.org/html/rfc5231/]                | supported    | Provides       |
|                                                                 |              | relational     |
|                                                                 |              | match support  |
+-----------------------------------------------------------------+--------------+----------------+
| imap4flags [http://tools.ietf.org/html/rfc5232/]                | supported    | Allows adding  |
|                                                                 |              | IMAP flags to  |
|                                                                 |              | stored messages|
+-----------------------------------------------------------------+--------------+----------------+
| subaddress [http://tools.ietf.org/html/rfc5233/]                | supported    | Allows testing |
|                                                                 |              | against        |
|                                                                 |              | delimited      |
|                                                                 |              | elements of the|
|                                                                 |              | local part of  |
|                                                                 |              | addresses      |
+-----------------------------------------------------------------+--------------+----------------+
| reject [http://tools.ietf.org/html/rfc5429#section-2.2]         | supported    | Allows         |
|                                                                 |              | rejecting      |
|                                                                 |              | messages with a|
|                                                                 |              | rejection      |
|                                                                 |              | bounce message |
+-----------------------------------------------------------------+--------------+----------------+
| enotify [http://tools.ietf.org/html/rfc5435/]                   | supported    | Provides the   |
|                                                                 |              | ability to send|
|                                                                 |              | notifications  |
|                                                                 |              | by various     |
|                                                                 |              | means          |
|                                                                 |              | (currently only|
|                                                                 |              | mailto)        |
+-----------------------------------------------------------------+--------------+----------------+
| mailbox [http://tools.ietf.org/html/rfc5490#section-3]          | supported    | Provides a     |
|                                                                 |              | mailbox        |
|                                                                 |              | existence check|
|                                                                 |              | and allows     |
|                                                                 |              | creating       |
|                                                                 |              | mailboxes upon |
|                                                                 |              | fileinto       |
+-----------------------------------------------------------------+--------------+----------------+
| environment [http://tools.ietf.org/html/rfc5183/]               | basic        | Allows testing |
|                                                                 |              | against various|
|                                                                 |              | labeled values |
|                                                                 |              | from the       |
|                                                                 |              | execution      |
|                                                                 |              | environment    |
+-----------------------------------------------------------------+--------------+----------------+
| date [http://tools.ietf.org/html/rfc5260#section-4]             | supported    | Adds the       |
|                                                                 |              | ability to test|
|                                                                 |              | date and time  |
|                                                                 |              | values in      |
|                                                                 |              | various ways   |
+-----------------------------------------------------------------+--------------+----------------+
| regex                                                           | supported    | Provides       |
| [http://tools.ietf.org/html/draft-murchison-sieve-regex-08/]    |              | regular        |
|                                                                 |              | expression     |
|                                                                 |              | match support  |
+-----------------------------------------------------------------+--------------+----------------+
| spamtest and virustest [http://tools.ietf.org/html/rfc5235/]    | experimental | Implements a   |
|                                                                 |              | uniform way to |
|                                                                 |              | test against   |
|                                                                 |              | headers added  |
|                                                                 |              | by spam and    |
|                                                                 |              | virus scanners |
+-----------------------------------------------------------------+--------------+----------------+
| include [http://tools.ietf.org/html/draft-ietf-sieve-include-05]| supported    | Allows         |
|                                                                 |              | including other|
|                                                                 |              | Sieve scripts  |
+-----------------------------------------------------------------+--------------+----------------+
| imapflags(obsolete draft                                        | supported    | Old version of |
| [http://tools.ietf.org/html/draft-melnikov-sieve-imapflags-03]) |              | imap4flags (for|
|                                                                 |              | backwards      |
|                                                                 |              | compatibility  |
|                                                                 |              | with CMU Sieve;|
|                                                                 |              | *disabled by   |
|                                                                 |              | default*)      |
+-----------------------------------------------------------------+--------------+----------------+
| notify (obsolete draft                                          | supported    | Old version of |
| [http://tools.ietf.org/html/draft-martin-sieve-notify-01])      |              | enotify (for   |
|                                                                 |              | backwards      |
|                                                                 |              | compatibility  |
|                                                                 |              | with CMU Sieve;|
|                                                                 |              | *disabled by   |
|                                                                 |              | default*)      |
+-----------------------------------------------------------------+--------------+----------------+

ManageSieve server
------------------

To give users the ability to upload their own Sieve scripts to your server,
i.e. without the need for shell or FTP access, you can use the Manage ''Sieve
protocol. This is also provided by the <Pigeonhole.txt> project. It is
available as a separate Dovecot service. Its configuration and use is explained
on the <Pigeonhole ManageSieve page> [Pigeonhole.ManageSieve.txt].

(This file was created from the wiki on 2012-02-12 04:42)
