.TH ENEMIES\-OF\-CARLOTTA 1
.SH NAME
enemies\-of\-carlotta \- a simple mailing list manager
.SH SYNOPSIS
.B enemies\-of\-carlotta 
.IR "" [ options "] [" addresses ]
.SH "DESCRIPTION"
.B enemies\-of\-carlotta
is a simple mailing list manager.
If you don't know what a mailing list manager is, you should learn
what they are before trying to use one.
A manual page is unfortunately too short to explain it.
.PP
Enemies of Carlotta keeps all data about the lists in the
.I ~/.enemies\-of\-carlotta
directory.
It will be created automatically when you create your first list.
You need to arrange manually for the mails to be processed by the
list manager.
The details differ from mail system to another.
For QMail and Postfix, see below.
.PP
Each list has one or more owners, who also moderate subscriptions or
moderate some or all postings.
On completely unmoderated lists the list owners are responsible for
answering questions about the list.
On completely moderated lists, they have to approve each message before
it is sent to the list.
On lists with 
.IR posting=auto ,
messages from subscribers are sent automatically to the list, and the
moderators have to approve the rest.
.SH OPTIONS
.TP
.BR \-\-name= foo@example.com
Specify the list the command is to operate on.
Most of the remaining options require you to set the list name with this
option.
With the \-\-edit, \-\-subscribe, \-\-unsubscribe, and \-\-list options,
the name can be abbreviated to by leaving out the @ sign and domain.
.TP
.BI \-\-create
Create a new list.
You must specify at least one owner with
.BR \-\-owner .
.TP
.BI \-\-owner= address
Specify a list owner when creating or editing a list.
.TP
.BI \-\-moderator= address
Specificy a list moderator when creating or editing a list.
.TP
.BI \-\-language= language\-code
Set the language code used for looking up template files.
The code should be empty (the default, meaning English), or a two\-letter
code such as 
.B fi
or
.BR es .
.TP
.B \-\-cleaning\-woman
Deal with bouncing addresses and do other cleanup.
You must run
.B "enemies\-of\-carlotta \-\-cleaning\-woman"
periodically, such as once per hour.
It will clean up all your lists.
.TP
.BI \-\-destroy
Destroy the list.
.TP
.BI \-\-edit
Modify the list configuration.
.TP
.BI \-\-subscription= type
When creating a list, set its subscription mode to
.I free
or
.IR moderated .
Use with
.BR \-\-edit ,
or
.BR \-\-create .
.TP
.BI \-\-posting= type
When creating a list, set its posting mode to
.IR free 
(anyone can post),
.IR auto
(only subscribers can post, mails from others need to be moderated),
or
.IR moderated 
(all mails are moderated).
Use with
.BR \-\-edit ,
or
.BR \-\-create .
.TP
.BI \-\-archived= yes\-or\-no
Should list messages be archived to the
.B archive\-box
directory in the list directory under the
.B "~/.enemies\-of\-carlotta"
directory.
Use
.I yes
or
.IR no .
.TP
.BI \-\-mail\-on\-subscription\-changes= yes\-or\-no
Should the list owners be notified when someone subscribes to or
unsubscribes from the list?
Use
.I yes
or
.IR no .
Default is no.
.TP
.BI \-\-mail\-on\-forced\-unsubscription= yes\-or\-no
Should list owners be notified when someone is forcibly dropped from
the list due to too much bouncing?
Use
.I yes
or
.IR no .
Default is no.
.TP
.BI \-\-ignore\-bounce= yes\-or\-no
Should bounces be ignored?
Use
.I yes
or
.IR no .
Default is no.
.TP
.BI \-\-list
List the subscribers of a list.
.TP
.BI \-\-subscribe
Add subscribers to a list.
The non\-option arguments are the addresses to be subscribed.
Note that addresses added this way won't be sent confirmation requests.
.TP
.BI \-\-unsubscribe
Remove subscribers from a list.
The non\-option arguments are the addresses to be unsubscribed.
Note that addresses removed this way won't be sent confirmation requests.
.TP
.B \-\-incoming
Deal with an incoming message in the standard input.
The SMTP envelope sender address must be given in the 
.I SENDER
environment variable, and the SMTP envelope recipient address in the
.I RECIPIENT
environment variable.
(QMail and Postfix do this automatically.)
.TP
.BI \-\-skip\-prefix= string
Before analyzing the recipient address to see which list it refers, remove 
.I string
from its beginning.
This helps deal with QMail and Postfix virtual domains, see above.
.TP
.BI \-\-domain= domain.name
Before analyzing the recipient address to see which list it refers, replace
the domain name part with
.IR domain.name .
This helps deal with Postfix virtual domains.
.TP
.BI \-\-is\-list
Does the address specified with
.B \-\-name
refer to a valid list?
This sets the exit code to zero (success) if it does, or one (failure)
if it does not.
.TP
.BI \-\-sendmail= pathname
Use 
.I pathname
instead of
.B /usr/sbin/sendmail
for sending mail via a command line interface.
Note that the command must obey the sendmail command line interface.
.TP
.BI \-\-smtp\-server= hostname
Send mail using the SMTP server at
.I hostname
(port 25).
The server must be configured to allow the list host to relay mail
through it.
Note that a command line interface is used by default;
SMTP sending is used only if you use this option.
.TP
.BI \-\-qmqp\-server= hostname
Send mail using the QMQP server at
.I hostname
(port 628).
The server must be configured to allow the list host to relay mail
through it.
Note that a command line interface is used by default;
QMQP sending is used only if you use this option.
.TP
.BI \-\-moderate
Force an incoming message to be moderated, even if it is going to a list
where posting is free.
This can be used for spam filtering: 
you pipe incoming messages through whatever spam filter you choose to use
and if the mssage looks like spam, you ask it to be moderated by a human.
.TP
.BI \-\-post
Force an incoming message to be posted, even if it is going to a list
where posting is moderated.
This can be used when there is an external check for whether a mail
is acceptable to the list, e.g., by checking digital signatures.
.TP
.BI \-\-quiet
By default, debugging log messages are sent to the standard error output
stream.
With this option, they aren't.
.TP
.BI \-\-sender= foo@example.com
.TP
.BI \-\-recipient= foo@example.com
These two options are used with 
.B \-\-incoming 
and
.B \-\-is\-list
to override the environment variables 
.B SENDER
and
.BR RECIPIENT ,
respectively.
.TP
.BI \-\-get
Get the values of one or more configuration variables.
The name of the variables are given on the command line after the options.
Each value is printed on a separate line.
.TP
.BI \-\-set 
Set the values of one or more configuration variables.
The names and values are given on the command line after the options
and separated by an equals sign ("=").
For example, the following would set the language of a list to Finnish:
.B "enemies\-of\-carlotta \-\-name=foo@bar \-\-set language=fi"
.TP
.BI \-\-version
Print out the version of the program.
.TP
.BI \-\-show\-lists
List the lists enemies\-of\-carlotta knows about.
.SH CONFIGURATION
Each list is represented by a directory, named after the list, in 
.IR ~/.enemies\-of\-carlotta .
That directory contains several files and directories, described below.
In general, it is not necessary to touch these at all.
However, some esoteric configuration can only be done by hand editing
of the list configuration file.
.TP
.B config
The list configuration file.
Contents are described below.
.TP
.B subscribers
Subscriber database.
Each line contains a subscriber group, with the first five space 
delimited fields being group identifier, status, timestamp for when
the group was created, timestamp for the bounce that made it switch
from status 'ok' to 'bounced', and the bounce identifier.
.TP
.B archive\-box
Archived messages.
.TP
.B bounce\-box
Bounce messages groups not in state 'ok'.
.TP
.B headers\-to\-add
These headers are added to the mails sent to the list.
They are copied to the beginning of the existing headers exactly as they
are in the file, after list headers ("List\-ID" and such) have been added
and those mentioned in 
.B headers\-to\-remove
have been removed.
.TP
.B headers\-to\-remove
These headers are removed from mails sent to the list.
.TP
.B moderation\-box
Messages waiting for moderator approval.
.TP
.B subscription\-box
Subscription and unsubscription requests waiting to be confirmed by the user.
.TP
.B templates
Directory containing list specific templates (optional). If this
directory exists, templates are searched from it before going for
system wide templates. An empty file here means the
corresponding message is not sent at all. This can, for example, to
be used to turn off the "please wait for moderator" mails on a per\-list
basis.
.TP
.B plugins
Directory containing plugins, Python source files that are loaded 
automatically by EoC upon startup.
The plugins may change how EoC operates.
.PP
The 
.B config
file has a 
.IR keyword = value
format:
.PP
.RS
.nf
[list]
owners = liw@liw.iki.fi
archived = no
posting = free
subscription = free
mail\-on\-subscription\-changes = yes
mail\-on\-forced\-unsubscribe = yes
language = fi
.fi
.RE
.PP
The keywords 
.BR archived , 
.BR posting ,
and
.B subscription 
correspond to the options with the same names.
Other keywords are:
.TP
.B owners
List of addresses for the owners. Set with the
.I \-\-owner
option.
.TP
.B moderators
List of addresses for the moderators. Set with the
.I \-\-moderator
option.
.TP
.B mail\-on\-subscription\-changes
Should the owners be mailed when users subscribe or unsubscribe?
.TP
.B mail\-on\-forced\-unsubscribe
Should the owners be mailed when people are removed from the list due to
excessive bouncing?
.TP
.B ignore_bounce
Bounce messages are ignored on this list. Useful for example if
list should have static subscriber list.
.TP
.B language
Suffix for templates, to allow support for multiple languages.
(If 
.I language
is set to "fi", then the template named "foo" is first searched as
"foo.fi".)
.TP
.B pristine\-headers
Do not MIME encode the headers. Set to "yes" to not encode, anything
else (including empty or unset) means encoding will happen.
.SH EXAMPLES
To create a list called 
.IR moviefans@example.com ,
owned by
.IR ding@example.com ,
use the following command (all on one line):
.sp 1
.nf
.RS
enemies\-of\-carlotta \-\-name=moviefans@example.com
\-\-owner=ding@example.com \-\-create
.RE
.fi
.PP
Note that you need to arrange mail to arrive at the list (and its
command addresses) by configuring your mail system.
For Qmail and Postfix, see below.
.PP
To see the subscribers on that list:
.sp 1
.nf
.RS
enemies\-of\-carlotta \-\-name=moviefans@example.com \-\-list
.RE
.fi
.PP
People wanting to subscribe to the list should mail
.sp 1
.nf
.RS
moviefans\-subscribe@example.com
.RE
.fi
.SH QMAIL
With QMail, to arrange for incoming mail to be processed by Enemies of
Carlotta, you need to create a couple of
.I .qmail\-extension
files per list.
For example, if your username is joe and you wish to run the
joe\-fans mailing list, you need to create two files,
.I .qmail\-fans
and
.IR .qmail\-fans\-default ,
containing
.sp 1
.RS
|enemies\-of\-carlotta \-\-incoming
.RE
.PP
If you're running a virtual domain, example.com, and the mails are
being delivered to via 
.I /var/qmail/control/virtualdomains
to
.IR joe\-exampledotcom ,
the files would be called
.I .qmail\-exampledotcom\-fans
and
.I .qmail\-exampledotcom\-fans\-default
and would contain
.sp 1
.RS
|enemies\-of\-carlotta \-\-incoming \-\-skip\-prefix=joe\-exampledotcom\-
.RE
.sp 1
(all on one line, of course, in case the manual page formatter breaks it
on several lines).
.SH COURIER-MTA
For Courier-MTA, the instructions are similar to the Qmail ones above.
If your user name is joe and you wish to run the joe-fans email list,
you need to create the two files .courier-fans and .courier-fans-default
in your home directory with the content
.sp 1
.RS
|enemies-of-carlotta --is-list --name $RECIPIENT || exit 67
.br
|enemies-of-carlotta --incoming
.RE
.sp 1
(The former file needs only the second line, but the first line does no
harm and it is easier to keep track of things when the files have the
same content.  Note that $RECIPIENT should be included verbatim, it is
not a metavariable for you to expand.)
.PP
If you are running a virtual domain configured so that all mail to the
domain @example.com is delivered to joe-exampledotcom, you need to
create the files .courier-exampledotcom-fans and
.courier-exampledotcom-fans-default containing the two following lines:
.sp 1
.RS
|enemies-of-carlotta --is-list --name $RECIPIENT --skip-prefix=joe-exampledotcom || exit 67
.br
|enemies-of-carlotta --incoming --skip-prefix=joe-exampledotcom
.RE
.sp 1
If the virtual domain is for list use only, then it is sufficient to
create only the file .courier-exampledotcom-default containing the
latter two lines.
.SH POSTFIX
With Postfix, you need to set up a
.I .forward
file containing
.sp 1
.RS
"|procmail \-p"
.RE
.sp 1
and then a
.I .procmailrc
file containing
.sp 1
.RS
:0
.br
* ? enemies\-of\-carlotta \-\-name=$RECIPIENT \-\-is\-list
.br
| enemies\-of\-carlotta \-\-incoming
.RE
.PP
To use Enemies of Carlotta with a Postfix virtual domain, you need to
set up a 
.IR "virtual regular expression map" ,
typically called
.I /etc/postfix/virtual_regexp
(add 
.I "virtual_maps = regexp:/etc/postfix/virtual_regexp"
to your 
.I /etc/postfix/main.cf
file to enable it).
The regexp file needs to do ugly things to preserve the recipient
address.
Add the following to the regexp file:
.sp 1
.RS
/^your\.virtual\.domain$/ dummy
.br
/^(yourlist|yourlist\-.*)@(your\.virtual\.domain)$/ joe+virtual\-$1
.RE
.sp 1
That's two lines. Use
.B joe-virtual
instead, if
.I recipient_delimiter
for your Postfix is configured to a minus instead of a plus..
Then, in your
.I .procmailrc
file, add the
.I "\-\-skip\-prefix=joe\-virtual\-"
and 
.I \-\-domain=your.virtual.domain
options to both calls to 
.BR enemies\-of\-carlotta .
.PP
(Yes, I think these things are much too complicated, too.)
.SH "MAIL COMMANDS"
Users and list owners use Enemies of Carlotta via e\-mail using
command addresses such as
.BR foo\-subscribe@example.com .
Here is a list of all command addresses list users and owners can give.
In all these examples, the name of the mailing list is
.BR foo@example.com .
.SS "Mail commands anyone can use"
These commands are meant for everyone's use.
They don't require any special priviledges.
.TP
.BR foo@example.com
Send mail to all list subscribers.
The message may have to be manually approved by the list moderators first,
and they have the power to reject a message.
.TP
.BR foo\-owner@example.com
Send mail to the list owner or owners instead.
.TP
.BR foo\-help@example.com
Sending mail to this address makes the list manager reply with
the help message for the list.
.TP
.BR foo\-subscribe@example.com
Send mail to this address to subscribe to a list.
The list manager will respond with a confirmation request.
You won't be subscribed unless you reply to the confirmation request.
This way, malicious people can't put your address on a mailing list,
or many mailing lists.
.TP
.BR foo\-subscribe\-joe=example.com@example.com
This is a second form of the subscription address.
If you want to subscribe to the list with another address than the
one you're sending mail from, use this one.
In this case, the address to be subscribed is joe@example.com.
Note that the confirmation request is sent to Joe, since it is
his address that is to be added to the list.
.TP
.BR foo\-unsubscribe@example.com
To unsubscribe from a list, send mail to this address from the address
that is subscribed to the list.
Again, you will receive a confirmation request, to prevent malicious
people from unsubscribing you against your will.
.TP
.BR foo\-unsubscribe\-joe=example.com@example.com
To unsubscribe Joe, use this address.
Again, it is Joe who gets to confirm.
.SS "Mail commands for the list owners"
These are commands that list owners can use to administer their list.
.TP
.BR foo\-subscribe\-joe=example.com@example.com
If a list owner sends mail like this, it is they who get the confirmation
request, not Joe.
It is generally better for people to subscribe themselves, but sometimes
list owners want to do it, when they have permission from the person
and feel helpful.
.TP
.BR foo\-unsubscribe\-joe=example.com@example.com
List owners can also unsubscribe other people.
.TP
.BR foo\-list@example.com
To see who are on the list, this is the address to use.
It only works if the sender address is one of the list owners.
The sender address is the one used on the SMTP level,
not the one in the From: header.
.TP
.BR foo\-setlist@example.com
This lets a list owner set the whole subscriber list at once.
This is similar to using lots and lots and lots of \-subscribe and
\-unsubscribe commands, only less painful.
Everyone who is added to the list gets a welcome message, and
everyone who is removed from the list gets a goodbye message.
.TP
.BR foo\-setlistsilently@example.com
This is similar to \-setlist, but no welcome and goodbye messages are sent.
.SH PLUGINS
Enemies of Carlotta supports plugins.
If you don't know what Python programming is, you may want to skip this
section.
.PP
A plugin is a Python module (file named with a 
.B .py
suffix), placed in the
.B ~/.enemies\-of\-carlotta/plugins
directory.
The plugins are loaded automatically upon startup, if their declared
interface version matches the one implemented by Enemies of Carlotta.
The interface version is declared by the module global variable
.BR PLUGIN_INTERFACE_VERSION .
.PP
Plugins can define hook functions that are called by appropriate places in
the EoC code.
At the moment, the only hook function is 
.BR send_mail_to_subscribers_hook ,
which can manipulate a mail message before it is sent to the subscribers.
The function must look like this:
.PP
.ti +5
def send_mail_to_subscribers_hook(list, text):
.PP
The
.I list
argument is a reference to the
.I MailingList
object that corresponds to the list in question, and 
.I text
is the complete text of the mail message as it exists.
The function must return the new contents of the mail message.
.SH FILES
.TP
.I ~/.enemies\-of\-carlotta
All files related to your mailing lists.
.TP
.I ~/.enemies\-of\-carlotta/secret
Secret password used to generate signed addresses for bounce checking
and subscription verification.
.TP
.I ~/.enemies\-of\-carlotta/foo@example.com
Directory containing data pertaining to the foo@example.com list.
Except for the 
.I config
file in this directory, you shouldn't edit anything by hand.
.TP
.I ~/.enemies\-of\-carlotta/foo@example.com/config
Configuration file for the mailing list.
You may need to edit this file by hand if you wish to change moderation
status or list owners.
.SH "SEE ALSO"
You may want to visit the 
.I "Enemies of Carlotta"
home page at
.IR http://www.iki.fi/liw/eoc/ .