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https://github.com/mbdevpl/maildaemon

Multi-server mail filtering daemon supporting IMAP, POP and SMTP.
https://github.com/mbdevpl/maildaemon

daemon imap-client jenkins-enabled mail-filter pop3-client smtp-client

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Multi-server mail filtering daemon supporting IMAP, POP and SMTP.

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.. role:: bash(code)
:language: bash

.. role:: json(code)
:language: json

==========
maildaemon
==========

Multi-server mail filtering daemon supporting IMAP, POP and SMTP.

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:alt: package version from PyPI

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:target: https://github.com/mbdevpl/maildaemon/actions
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:target: https://codecov.io/gh/mbdevpl/maildaemon
:alt: test coverage from Codecov

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:alt: grade from Codacy

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:target: NOTICE
:alt: license

The goal of this library is to enable unified filtering for various e-mail servers,
as well as inter-account filtering. Additional aim of this project is to enable filtering e-mails
in a centralized way as opposed to some filters being applied by the server,
and another filters by the client.

Eventually, maildaemon should make provider-dependent and client-dependent mail filtering settings obsolete.
It is currently in development and doesn't achieve its goals yet.

Usage examples are shown in ``_

.. contents::
:backlinks: none

Installation
============

For simplest installation use :bash:`pip`:

.. code:: bash

pip3 install maildaemon

Python 3.11 or later is required, and required dependencies defined in ``_
will be automatically installed too.

Maildaemon works based on a JSON configuration file. If it doesn't exist,
default one will be generated. An example is provided in ``_.

Supported protocols
===================

Currently, the package has a very limited support for:

* IMAP4rev1 -- via Python built-in `imaplib `_ module.

You can see how the module works in ``_.

* SMTP -- via Python built-in `smtplib `_ module.

You can see how the module works in ``_.

* POP3 -- via Python built-in `poplib `_ module.

You can see how the module works in ``_.

Supported authentication
========================

* password
* oauth

Configuration
=============

The configuration file has two sections:

.. code:: json

{
"connections": { },
"filters": { }
}

A complete example is provided in ``_.

Connections
-----------

The "connections" section is a dictionary where keys are human-readable connection names,
and values are dictionaries that describe connection parameters.

For password authentication, connection parameters are:

* protocol -- IMAP, POP or SMTP
* domain -- a string of characters
* ssl -- a boolean flag
* port -- a number
* login -- a string of characters
* password -- a string of characters

.. code:: json

{
"test-imap-ssl": {
"protocol": "IMAP",
"domain": "127.0.0.1",
"ssl": true,
"port": 993,
"login": "testuser",
"password": "applesauce"
},
"test-pop-ssl": {
"protocol": "POP",
"domain": "127.0.0.1",
"ssl": true,
"port": 995,
"login": "testuser",
"password": "applesauce"
}
}

For Oauth authentication, the password can be left empty, but additional parameters
need to be configured instead. Simplified list of parameters to connect to Gmail is provided below:

.. code:: json

{
"test-gmail": {
"protocol": "IMAP",
"domain": "",
"ssl": true,
"port": 993,
"oauth": true,
"oauth-data": {
"token_path": "/path/to/where/tokenfile/will/be/stored.json",
"client_id": "???.apps.googleusercontent.com",
"project_id": "???",
"auth_uri": "https://accounts.google.com/o/oauth2/auth",
"auth_uri_params": {"access_type": "offline", "prompt": "select_account"},
"token_uri": "https://oauth2.googleapis.com/token",
"auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
"client_secret": "???",
"redirect_uris": ["urn:ietf:wg:oauth:2.0:oob", "http://localhost"],
"scopes": ["https://mail.google.com/"]
},
"login": "[email protected]",
"password": ""
}
}

Filters
-------

The "filters" section is a dictionary as well, where keys are human-readable filter names,
and values are dictionaries that describe filter parameters.

Filter parameters are:

* connections -- a list of human-readable connection names defined in the "connections" section
* condition -- a Python expression, described in detail below
* actions -- a list (sequence) of commands to perform, described in detail below

.. code:: json

{
"facebook-notification": {
"connections": [
"test-imap"
],
"condition": "from_address.endswith('@facebookmail.com') and from_address.startswith('notification')",
"actions": [
"mark:read"
]
}
}

Filter condition
~~~~~~~~~~~~~~~~

Details to be decided.

Filter actions
~~~~~~~~~~~~~~

* move -- Move the message to a specific folder on a specific account.

"move:Gmail/INBOX/my mailing list" will move the message to a folder "/INBOX/my mailing list"
in account named "Gmail".

"move:/Archive/2018" will move the message to the "/Archive/2018" folder within the same account.

* mark -- Used to mark messages as read, unread etc.

"mark:read" will mark message as read.

"mark:unread" will mark message as unread.

"mark:important" will mark a message as important. Effect may vary between clients.
In Gmail web mail client this is visible as star, in Mac mail client as a red flag,
in Evolution as "Important message".

* More actions to be implemented.

Testing locally
===============

Start Greenmail server in docker:

.. code:: bash

docker run --rm -d --name greenmail -p 3143:3143 -p 3993:3993 -p 310:3110 -p 3995:3995 -p 3025:3025 -p 3465:3465 -e GREENMAIL_OPTS='-Dgreenmail.verbose -Dgreenmail.setup.test.all -Dgreenmail.hostname=0.0.0.0 -Dgreenmail.users=login:[email protected] -Dgreenmail.users.login=email -Dgreenmail.auth.disabled' -t greenmail/standalone:2.0.0

Make sure that services are running:

.. code:: bash

.build/check_ports.sh

Run tests:

.. code:: bash

TEST_COMM=1 python3 -m coverage run --branch --source . -m unittest -v test.test_smtp_connection
TEST_COMM=1 python3 -m coverage run --branch --source . -m unittest -v

Stop the Greenmail server:

.. code:: bash

docker container kill greenmail