Mailman - The GNU Mailing List Management System
Copyright (C) 1998-2003 Free Software Foundation, Inc.
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
This file contains installation instructions for GNU Mailman, which is
configured using the standard GNU autoconf software. You first need
to prepare your system as outlined in the sections below, and then
configure and install the Mailman software.
UPGRADING: Upgrading is usually as easy as just installing the new
version over the existing installation. However, you should read the
notes in the file UPGRADING for important information before you
upgrade.
0. Installation requirements
You must have a mail server (MTA) that you can send messages to,
and a web server that supports the CGI/1.1 API. Apache makes a
fine choice for web server, and MTAs such as Postfix, Exim,
Sendmail, and qmail should work just fine.
You will need an ANSI C compiler to build Mailman's security
wrappers. The GNU C compiler gcc 2.8.1 or later is known to work
well. For more information about obtaining gcc, see
http://www.gnu.org
You must have the Python interpreter installed somewhere on your
system. Currently Python 2.1.3 or Python 2.2.1 is recommended.
For information about obtaining Python source code, RPM packages,
or pre-compiled binaries please see:
http://www.python.org
If you are building Python from source, you should be fine with
the standard "./configure ; make install" for most Unix-like
OSes. If you run "make test", you'll see a bunch of tests skipped
-- don't worry, you probably won't need them. Mailman tries to
stick to the basics that compile on most systems.
If there is a README.<yourMTA> file that describes your mail
server (MTA), read it now. Some MTAs can be integrated more
seamlessly with Mailman for support of some advanced features
(like creation and removal of lists through-the-web). Examples
are Exim and Postfix. Setup instructions for specific MTAs are
contained in these README files.
1. System setup
You will need to be root to perform the steps in this section.
Before installing the Mailman software, you need to prepare your
system by adding certain users and groups.
- Add a new user called `mailman'. Typically this is added to
your /etc/passwd file. If username `mailman' is already in use,
choose something else unique and see the --with-username flag
below.
- Add a new group called `mailman'. Typically this is added to
your /etc/group file. The Mailman files will be installed under
the `mailman' group, with the set-group-id bit. Mailman's
security is based on group-ownership permissions, so it is
important to get this step right. If groupname `mailman' is
already in use, choose something else unique and see the
--with-groupname below. The mailman user created in the
previous step must be a member of this group.
- Create an installation directory (called $prefix in the
documentation that follows). All of the Mailman files will be
installed under $prefix. Run "configure --help" for ways to
split the installation based on read-only vs. read/write files.
The default installation directory for Mailman 2.1 is
/usr/local/mailman. It used to be /home/mailman for all
versions prior to Mailman 2.1alpha2. You can override the
default by using the --prefix option to configure (see below).
If you're upgrading from a version previous to Mailman 2.1, you
will need to use --prefix unless you move your mailing lists
(this can be a wise upgrade strategy).
Watch out if your site does something like mount /usr/local with
the nosuid option. This will break Mailman, which relies on
set-gid programs for its security. If this describes your
environment, simply install Mailman in a location that allows
setgid programs.
Make sure the install directory is set to group `mailman' (or
whatever you're going to specify as --with-groupname) and has
the setgid bit set (but see README.BSD if you're on a BSD
system). You probably also want to guarantee that this
directory is readable and executable by everyone. For example,
these shell commands will accomplish this:
% cd $prefix
% chgrp mailman .
% chmod a+rx,g+ws .
You are now ready to configure and install the Mailman software.
2. Running configure
TAKE SPECIAL NOTE OF THE --with-mail-gid AND --with-cgi-gid
OPTIONS BELOW. YOU WILL PROBABLY NEED TO USE THESE!
You should not be root while performing the steps in this section.
Do them under your own login, or whatever account you typically
use to install software. You do not need to do these steps as
user mailman, but you could. However, make sure that the login
used is a member of the mailman group as that that group has write
permissions to the $prefix directory made in the previous step.
Make sure that you have write permissions to the target
installation directory, and permission to create a setgid file in
the file system where it resides (NFS and other mounts can be
configured to inhibit setgid settings).
If you've installed other GNU software, you should be familiar
with the configure script. Usually you can just cd to the
directory you unpacked the Mailman source tarball into, and run
configure with no arguments:
% cd mailman-<version>
% ./configure
% make install
The following options allow you to customize your Mailman
installation.
--prefix=<dir>
Standard GNU configure option which changes the base
directory that Mailman is installed into. By default
$prefix is /usr/local/mailman. This directory must
already exist, and be set up as described in section 1
above.
--exec-prefix=<dir>
Standard GNU configure option which lets you specify a
different installation directory for architecture
dependent binaries.
--with-var-prefix=<dir>
Store mutable data under <dir> instead of under the prefix
or exec_prefix.
--with-python=</path/to/python>
Specify an alternative Python interpreter to use for the
wrapper programs. The default is to use the interpreter
found first on your shell's $PATH. Note that when running
the scripts from the command line, the first Python
interpreter found on $PATH is always used.
--with-username=<username-or-uid>
Specify a different username than `mailman' to use as a
default. Use this only if the username `mailman' is
already in use by somebody (e.g. Mark Ailman's login
name). This switch can take an integer user id or a user
name. Be sure your $prefix directory is owned by this
user.
--with-groupname=<groupname-or-gid>
Specify a different groupname than `mailman' to use as a
default. Use this only if the groupname `mailman' is
already in use. This switch can take an integer group id
or a group name. Be sure your $prefix directory is
group-owned by this group.
--with-mail-gid=<group-or-groups>
Specify an alternative group for running scripts via the
mail wrapper. <group-or-groups> can be a list of one or
more integer group ids or symbolic group names. The first
value in the list that resolves to an existing group is
used. By default, the value is the list
`mailman other mail daemon'.
This is highly system dependent and you must get this
right, because the group id is compiled into the mail
wrapper program for added security. On systems using
sendmail, the sendmail.cf configuration file designates
the group id of sendmail processes using the "DefaultUser"
option. (If commented out, it still may be indicating the
default...)
Check your MTA's documentation and configuration files to
find the right value for this switch.
--with-cgi-gid=<group-or-groups>
Specify an alternative group for running scripts via the
CGI wrapper. <group-or-groups> can be a list of one or
more integer group ids or symbolic group names. The first
value in the list that resolves to an existing group is
used. By default, the value is the the list
`www www-data nobody'.
The proper value for this is dependent on your web server
configuration. You must get this right, because the group
id is compiled into the CGI wrapper program for added
security, and no Mailman CGI scripts will run if this is
incorrect.
If you're using Apache, check the values for the `Group'
option in your httpd.conf file.
--with-cgi-ext=<extension>
Specify an extension for cgi-bin programs. The CGI
wrappers placed in $PREFIX/cgi-bin will have this
extension (some web servers require an extension).
<extension> must include the dot.
--with-gcc=no
Don't use gcc, even if it is found. In this case, `cc'
must be found on your $PATH.
3. Check your installation
After you've run "make install", you can check that your
installation has all the correct permissions and group ownerships
by running the check_perms script:
- cd to $prefix
- Run bin/check_perms
Don't try to run bin/check_perms from the source directory; it
will only run from the install (i.e. $prefix) directory.
If this reports no problems, then it's very likely <wink> that
your installation is set up correctly. If it reports problems,
then you can either fix them manually, re-run the installation, or
use check_perms to fix the problems (probably the easiest
solution):
- You need to become the user that did the installation (and that
owns all the files in $prefix), or root.
- Run bin/check_perms -f
- Repeat previous step until no more errors are reported!
4. Final system set-up
Congratulations! You've installed the Mailman software. To get
everything running you need to hook Mailman up to both your web
server and your mail system.
- If you plan on running your MTA and web server on different
machines, sharing Mailman installations via NFS, be sure that
the clocks on those two machines are synchronized closely. You
might take a look at the file Mailman/LockFile.py; the constant
CLOCK_SLOP helps the locking mechanism compensate for clock skew
in this type of environment.
- Configure your web server to give $prefix/cgi-bin permission to
run CGI scripts. You probably need to be root to do this.
The line you should add might look something like the following
(with the real absolute directory substituted for $prefix, of
course):
Exec /mailman/* $prefix/cgi-bin/*
or:
ScriptAlias /mailman/ $prefix/cgi-bin/
Consult your web server's documentation for details.
- You want to be very sure that the user id under which your CGI
scripts run is *not* in the `mailman' group you created above,
otherwise private archives will be accessible to anyone.
- Copy the Mailman, Python, and GNU logos to a location accessible
to your web server. E.g. with Apache, you've usually got an
`icons' directory that you can drop the images into. For
example:
% cp $prefix/icons/*.{jpg,png} /path/to/apache/icons
You then want to add a line to your $prefix/Mailman/mm_cfg.py
file which sets the base URL for the logos. For example:
IMAGE_LOGOS = '/images/'
The default value for IMAGE_LOGOS is '/icons/'. Read the
comment in Defaults.py.in for details.
- Configure your web server to point to the Pipermail public
mailing list archives:
For example, in Apache:
Alias /pipermail/ $varprefix/archives/public/
where $varprefix is usually $prefix unless you've used the
--with-var-prefix option to configure.
Consult your web server's documentation for details. Also be
sure to configure your web server to follow symbolic links in
this directory, otherwise public Pipermail archives won't be
accessible. For Apache users, consult the FollowSymLinks
option.
Also, if you're going to be supporting internationalized public
archives, you will probably want to turn off any default charset
directive for the Pipermail directory, otherwise your
multilingual archive pages won't show up correctly. Here's an
example for Apache, based on the standard installation
directories:
<Directory "/usr/local/mailman/archives/public/">
AddDefaultCharset Off
</Directory>
Now restart your web server.
- Create a "site-wide" mailing list. This is the one that
password reminders will appear to come from. Usually this
should be the "mailman" mailing list, but if you need to change
this, be sure to change the MAILMAN_SITE_LIST variable in
mm_cfg.py (see below).
% bin/newlist mailman
Follow the prompts, and see the README file for more
information.
Now configure your site list. There is a convenient template
for a generic site list in misc/sitelist.cfg to help you with
this. The template can be applied to your site list by running:
% bin/config_list -i data/sitelist.cfg mailman
Before doing this, review the configuration options in the
template (note that many options are not changed by
sitelist.cfg). After you do this, be sure you review the
configurations via the admin pages for this list.
Be sure to subscribe yourself to the site list, but use the
admin interface because mailback subscription confirmations
won't work at this point.
- Set up the crontab entries. Mailman runs a number of cron jobs
for its basic functionality. Note that if you're upgrading from
a previous version of Mailman, you'll want to install the new
crontab, but be careful if you're running multiple Mailman
installations on your site! Changing the crontab could mess
with other parallel Mailman installations.
If your version of crontab supports the -u option, you must be
root to do this next step. Add $prefix/cron/crontab.in as a
crontab entry by executing these commands:
% cd $prefix/cron
% crontab -u mailman crontab.in
If you used the --with-username option, use that user name
instead of mailman for the -u argument value. If your crontab
does not support the -u option, try these commands:
% cd $prefix/cron
% su - mailman
% crontab crontab.in
- Start the Mailman qrunner daemon, by executing the following
from the $prefix directory:
% bin/mailmanctl start
If you want to start Mailman every time you reboot your system,
and your OS supports the chkconfig command (e.g. RedHat and
Mandrake Linuxes) you can simply do the following (as root, from
the Mailman install directory):
% cp scripts/mailman /etc/init.d/mailman
% chkconfig --add mailman
(Note that /etc/init.d may be /etc/rc.d/init.d on some systems.)
On Debian, you probably want to use
% update-rc.d mailman defaults
instead of chkconfig.
For Unixes that don't support chkconfig, simply copy
scripts/mailman as above:
% cp scripts/mailman /etc/init.d/mailman
then set up the following symbolic links, again as root:
% cp misc/mailman /etc/init.d
% cd /etc/rc.d/rc0.d
% ln -s ../init.d/mailman K12mailman
% cd ../rc1.d
% ln -s ../init.d/mailman K12mailman
% cd ../rc2.d
% ln -s ../init.d/mailman S98mailman
% cd ../rc3.d
% ln -s ../init.d/mailman S98mailman
% cd ../rc4.d
% ln -s ../init.d/mailman S98mailman
% cd ../rc5.d
% ln -s ../init.d/mailman S98mailman
% cd ../rc6.d
% ln -s ../init.d/mailman K12mailman
- Check the values for DEFAULT_EMAIL_HOST and DEFAULT_URL_HOST in
Defaults.py. Make any necessary changes in the mm_cfg.py file.
Note that if you change either of these two values, you'll want
to add the following afterwards in the mm_cfg.py file:
add_virtualhost(DEFAULT_URL_HOST, DEFAULT_EMAIL_HOST)
5. Customize Mailman
You should do these steps using the account you installed Mailman
under in section 2 above.
- The file $prefix/Mailman/Defaults.py contains a number of
defaults for your installation. If any of these are incorrect,
override them in $prefix/Mailman/mm_cfg.py, NOT IN Defaults.py!
See the comments in Defaults.py for details. Once a list is
created, editing many of these variables will have no effect.
At that point, you'll need to configure your lists through the
web admin interface or through the command line script
bin/withlist or bin/config_list.
The install process will not overwrite an existing mm_cfg.py
file so you can freely make changes to this file.
Note: Do *not* change HOME_DIR or MAILMAN_DIR. These are set
automatically by the configure script.
- Create the site password using:
% $prefix/bin/mmsitepass <your-site-password>
This password can be used anywhere that individual user or
mailing list administrator passwords are required, giving the
mailman site administrator the ability to adjust these things
when necessary.
You may also want to create a password for the site-wide "list
creator" role (someone other than the site administrator who as
privileges to create and remove lists through the web). Use the
-c option to mmsitepass to set this.
6. Getting started
See the README file under the section "CREATE YOUR FIRST LIST" for
a quick introduction to creating an initial test list.
7. Troubleshooting
If you encounter problems with running Mailman, first check the
"Common Problems" section, below. If your problem is not covered
there, check both the FAQ file and the online FAQ Wizard. Also
check for errors your syslog files and in the $prefix/logs/error
file.
Where syslog lives on your particular machine may vary. It may be
in /var/log/maillog. It may also be in /var/log/syslog. On many
machines, syslog files live in /adm/log/ instead of /var/log.
If you encounter an error, send an error report to
mailman-users@python.org. Include a description of what you're
doing to cause the problem, and the relevant lines from your
syslog. Also include information on your operating system, which
version of Python you're using, and which version of Mailman
you're installing.
8. Common Problems
Problem: All Mailman web pages give a 404 File not found error.
Solution: Your web server has not been set up properly for handling
Mailman's cgi commands. Make sure you've:
1) Configured the web server to give permissions to
$prefix/cgi-bin
2) Restarted the web server properly.
Consult your web server's documentation for instructions
on how to do these things.
Problem: All Mailman web pages give an "Internal Server Error".
Solution: The likely problem is that you are using the wrong GID or
UID for CGI scripts. Check your syslog. If you see, for
example, a line like:
Attempt to exec script with invalid gid 51, expected 99
You need to reinstall Mailman, and specify $CGI_GID to be 51,
as described in the installation instructions.
Problem: I send mail to the list, and get back mail saying the
list is not found!
Solution: You probably didn't add the necessary aliases to the system
alias database, given to you when you ran the newlist
command. If you did add them, you likely did not update
the alias database, or your system requires you to run
newaliases explicitly. Refer to section 5 above for
more information.
Problem: I send mail to the list, and get back mail saying,
"unknown mailer error".
Solution: The likely problem is that you are using the wrong GID or
UID for mail. Check your syslog. If you see, for
example, a line like:
Attempt to exec script with invalid gid 51, expected 99
You need to reinstall Mailman, and specify $MAIL_GID to
be 51, as described in the installation
instructions. see notes on Postfix below, as by default
it will create these problems on installation.
Problem: I use Postfix for my MTA and the mail wrapper programs
are logging complaints about the wrong GID.
Solution: Create a separate aliases file for Postfix in its
main.cf config file under the variable "alias_maps". Put
the file somewhere in Mailman's home directory, or
somewhere else where the user mailman has write access
to it; *as user mailman* call Postfix's "postalias" on the
alias file.
% postalias <the alias file>
Also as user mailman, run
% python -c'import os; print os.getgid()'
This should print out the group id that Mailman should
be configured to expect when the mail wrapper programs
are run. Call it "thegid". Rebuild Mailman with
% ./configure --with-mail-gid=thegid
See also the README.POSTFIX file for more information on
connecting Postfix and Mailman.
Problem: I send mail to the list, and get back mail saying,
"sh: mailman not available for sendmail programs"
Solution: Your system uses sendmail restricted shell (smrsh). You
need to configure smrsh by creating a symbolic link from
the mail wrapper ($prefix/mail/mailman) to the directory
identifying executables allowed to run under smrsh.
Some common names for this directory are
/var/admin/sm.bin, /usr/admin/sm.bin or /etc/smrsh.
Note that on Debian Linux, the system makes
/usr/lib/sm.bin, which is wrong, you will need to create
the directory /usr/admin/sm.bin and add the link there.
Note further any aliases newaliases spits out will need
to be adjusted to point to the secure link to the
wrapper.
Problem: I messed up when I called configure. How do I clean
things up and re-install?
Solution: % make clean
% ./configure --with-the-right-options
% make install
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