Ubuntu Manpage: schleuder - an email hub for groups

NAME

       schleuder - an email hub for groups

SYNOPSIS

       schleuder work listaddress < email

       schleuder help

       schleuder other-command [<...>]

       For descriptions of the other commands see the output of the help-command.

       This  manual  page is written for system administrators. For other information please read
       the Schleuder documentation online (SEE ALSO).

DESCRIPTION

       Schleuder is an  email  hub  for  groups.  Subscribers  can  communicate  encryptedly  and
       pseudonymously  among  themselves,  receive emails from non-subscribers and send emails to
       non-subscribers via the list.

       Schleuder takes  care  of  all  de-  and  encryption,  stripping  of  headers,  formatting
       conversions,  etc.  Further  Schleuder  can  send  out  its  own  public  key  and receive
       administrative commands by email.

       Email cryptography is handled by using GnuPG.

ENVIRONMENT

Configuration
Schleuder reads its basic settings from a file that it by default expects at
</etc/schleuder/schleuder.yml>. To make Schleuder read a different file set the
environment variable SCHLEUDER_CONFIG to the path to your file when running schleuder.
E.g.:

SCHLEUDER_CONFIG=/usr/local/etc/schleuder.yml /path/to/bin/schleuder ...

For explanations of the possible settings read the default config file.

The default settings for new lists are read from another config file. By default Schleuder
looks at </etc/schleuder/list-defaults.yml>. To make Schleuder read a different file set
the environment variable SCHLEUDER_LIST_DEFAULTS analogous to above. The possible settings
are explained in the default config file.

Connect to MTA
Schleuder behaves like an email-filter: it reads email from standard-input, and reports
errors to standard-error. If all goes well Schleuder closes the initial connection to the
Mail Transport Agent (MTA) only after it sent out all outgoing emails.

In case of an error the MTA is expected to include Schleuder´s error message into a
bounce-email that is sent back to the sender (this is default behaviour of most MTAs).

To connect the MTA with Schleuder it must pipe the incoming message into Schleuder´s
STDIN, and give it two arguments: first one: "work", second one: the full recipients email
address.

For more information on how to integrate Schleuder with your existing mail setup, please
read the Schleuder documentation online (SEE ALSO).

Data storage
The keyrings for each list are standard GnuPG keyrings and sit in the filesystem under
lists_dir/hostname/listname/ (lists_dir is read from schleuder.yml, by default it is
</var/lib/schleuder/lists>). They can be used manually using gpg2. Please be careful to
maintain proper file permissions if you touch the files.

In the list-directory there’s also a list specific log-file (might be missing if the
log-level is high and no error occurred yet).

Other logging is sent to syslog. Where that ends up depends on the operating system and
the system administration.

All other list-related data is stored in the SQL-database. Most data is unserialized, only
some values are JSON-encoded.

SPECIAL FEATURES

       Schleuder features some special functionality. For  more  detailed  information  read  the
       Schleuder documentation online (SEE ALSO).

   Getting the public key of a list
       Each   Schleuder-list   replies   with   its   public   key   to   any   email   sent   to
       listname-sendkey@hostname. E.g. to  receive  the  key  for  the  contact  address  of  the
       Schleuder project write an email to
       team-sendkey@schleuder.org.

   Email commands
       Schleuder  knows  some  special  keywords  that  trigger different behaviour. You can e.g.
       subscribe someone, or resend an email to a non-subscriber using keywords.

       Keywords require that:

       •   they start the line and begin with "x-",

       •   they are written into the beginning of the  first  text-part  of  the  email  (usually
           that’s just the normal body of the email),

       •   possible  arguments  must  be  written on the same line as the keyword (exceptions are
           mentioned in the descriptions below),

       •   the email must be encrypted and signed by a list-member’s key.

       Keywords can be repeated within one email at will. Letter case doesn’t matter.

       There  are  two  types  of  keywords:  those  to  enhance  messages  sent  over  the  list
       (“list-keywords”), and those to request something from Schleuder (“request-keywords”).

       Find detailed descriptions of all available keywords in the Schleuder documentation online
       (SEE ALSO).

   Contact list-owner
       Write to listname-owner@hostname to contact the list-owner(s) even if you don´t  know  who
       they are. Use the list´s key to encrypt the email!

EXIT STATUS

       0      Incoming email was processed without errors.

       1      Internal failure in incoming email processing.

FILES

       •   /etc/schleuder/schleuder.yml: default path of global Schleuder configuration

       •   /etc/schleuder/list-defaults.yml: default path of default list settings

       •   /var/lib/schleuder/lists default path of lists_dir

       •   <lists_dir>/<hostname>/`listname: list internal data

       •   /var/log/schleuder/<hostname>/<listname>/list.log`: log-file for list

       All configuration files are formatted as YAML. See http://www.yaml.org/ for more details.

BUGS

       Known      bugs      are      listed      on      the      Schleuder     bugtracker     at
       https://0xacab.org/schleuder/schleuder