SquirrelMail Installation for Debian 7

WebMail behind Apache2 authentication depending on logins

• install it

apt-get install squirrelmail squirrelmail-secure-login squirrelmail-compatibility squirrelmail-decode wngerman wamerican-large php-gettext php-xml-parser aspell spellutils emacsen-common php5-mhash aspell-doc ispell php5-common libapache2-mod-authnz-external

• check /usr/share/squirrelmail/plugins/secure_login/functions.php ca. line 391, look for code like

if ( $serverPort == $targetHttpsPort && $secure_logoff_count == 0)

below that look for

 $location = 'http:// ....

If you find it, replace it with https. (It seems to be fixed in certain versions)

 $location = 'https:// ....

• call /etc/squirrelmail/conf.pl

Options you will definitely need to check are: (use ports 25 and 143)

(Options are listed by main menu, then sub menu number. So "1 1" refers to option 1, sub option 1. And so on.)

• 1 1 - Set your own organisation name.
• 2 3 - SMTP
• 2 A 4 - localhost
• 2 A 5 - 143
• 2 A 6 - login
• 2 A 7 - false (we are local, if not, use true)
• 2 A 8 - dovecot

Apache

link to /var/www

cd /var/www
ln -s /usr/share/squirrelmail

in /etc/apache2/ports.conf

• disable all ports but 431 which depends on a module
• activate the module

cd /etc/apache2/mods-enabled/
ln -s ../mods-available/ssl.load
ln -s ../mods-available/ssl.conf

• enable authnz_external the easy way (both ways have the same result: a link)

a2enmod authnz_external 

in /etc/apache2/sites-available/110-squirrel-ssl.conf

<IfModule mod_ssl.c>
    <VirtualHost *:443>
    ServerName mail.yourdomain.de
    Alias /var/www/squirrelmail /usr/share/squirrelmail
    DocumentRoot /usr/share/squirrelmail/
    <Directory /usr/share/squirrelmail>
        Options Indexes FollowSymLinks
        <IfModule mod_php4.c>
            php_flag register_globals off
        </IfModule>
        <IfModule mod_php5.c>
            php_flag register_globals off
        </IfModule>
        <IfModule mod_dir.c>
            DirectoryIndex index.php
        </IfModule>
    </Directory>
    SSLEngine on
    SSLCertificateFile    /etc/exim4/exim.crt
    SSLCertificateKeyFile /etc/exim4/exim.key

    AddExternalAuth pwauth /usr/sbin/pwauth
    SetExternalAuthMethod pwauth pipe

    <Location />
        AuthBasicProvider external
        AuthExternal pwauth
        AuthName your-domain
        AuthType basic
        Require valid-user
    </Location>

    </VirtualHost>
</IfModule>

• enable it

cd  cd /etc/apache2/sites-enabled/
ln -s ../sites-available/110-squirrel-ssl.conf

• remove the default

rm 000-default

• restart apache

/etc/init.d/apache2 restart

• allow https in your firewall

for example firehol:

server https accept

Plugins

• get new plugins from [1] and unzip them to /usr/share/squirrelmail/plugins/

and activate them with

/etc/squirrelmail/conf.pl

Check in /etc/php5/apache2/php.ini:

• post_max_size
• upload_max_filesize