Author: Robert Marianski



Listen is a mailing list management application that integrates into the Plone
Content Management System.  It is based on the venerable MailBoxer Zope
Product by Maik Jablonski, and offers most of the features of that product.
Key features include:

- Easily create mailing lists through the Plone interface.

- Lists may be moderated or unmoderated, open to all or restricted to
  subscribers only.

- Optional archiving of mail with or without attachments.

- Fully threaded archive display, including a forum-like view.

- Portal members and visitors can easily subscribe/unsubscribe themselves
  through the Plone interface.

- Each list maintains its own catalog featuring a full text index of messages.

- Members can make responses with quotation to archived messages through the
  Plone interface.

- Automatic masking of member email addresses with links to author pages.

- Provides a registry of lists on a Zope instance allowing lists to be added
  without any additional SMTP server configuration.

- Performs well due to use of simple Zope types and z3/Five techniques.
  Capable of higher mail volume that MailBoxer itself, and much greater
  volume than Archetypes-based mailing list systems.

This product makes heavy use of Zope3 features within Plone via Five; it uses
views, adapters, Zope3 schemas (add and edit views), local utilities,
factories, and events.  It is not an ideally componentized application because
of its dependence on MailBoxer, which is used as the base class for the
primary content type, and provides more logic/functionality than an
ideal content class would.  Hopefully, those parts which make heavy use of
Five technologies can serve as a helpful example for those intending to use
Five in their own products.


Plone 2.1+ (and all that entails)
Zope 2.8.4+
Five 1.4
MailBoxer (svn version from
ManagableIndex 1.1
(also OFolder
plone.mail (

Highly Recommended

MaildropHost 1.13+ (
    Any site that expects a reasonable amount of mail traffic (incoming and
    especially outgoing) needs to use this.  It well not send duplicate mails
    when a conflict error forces a retry, and it increases potential incoming
    mail volume tremendously by not blocking on sending mail.

Installation and setup

Place this product folder in your Zope instance's Products folder and restart
Zope.  Go to the portal_quickinstaller in the ZMI and install the product. Now
you may create mailing lists by using the add menu in any container in Plone,
or (preferably) using the add view for the Mailing List class which can be
accessed with a url of the following form:

Hopefully, Five add forms will be integrated into the Plone ui in the near
future so that the more correct way is also the easy way to add a list.

Your SMTP server must be configured to route mail to the mailing list(s).  For
a simple single list instance the easiest way to do this is the standard
MailBoxer way:

1) Copy the script from your MailBoxer folder to the relevant
SMTP server (if you are using sendmail with smrsh, then you need to place/link
it in a folder accessible to smrsh; for postfix place/link it in /etc/postfix).

2) Add an alias for the mailing list of the form:    "|/etc/smrsh/ 200000"

for postfix:
my_list:      "|/etc/postfix/ 200000"

Where the number at the end restricts the maximum size of a message intended
for the list, this is optional, but highly recommended.

If you would like to be able to setup arbitrary lists on your server and have
them automatically handled by your SM