HOW TO CONFIGURE SQUIRREL MAIL:

1. Install apache webserver
 # apt-get install apache2
 # apt-get install php5

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2. Now we will download squirrel mail tar.gz file  
# wget http://sourceforge.net/projects/squirrelmail/files/stable/1.4.21/squirrelmail-1.4.21.tar.gz  
it will download the squirrelmail file in postfix directory. Lets check with ls command.
 
3. Copy the downloaded file to /var/www directory....  
# cp squirrelmail-1.4.21.tar.gz /var/www
 
4. Now Change directory to /var/www  
 # cd /var/www

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5. Now we will extract the downloaded tar.gz file  
# tar -zxvf squirrelmail-1.4.21.tar.gz
 
6. Rename squirrelmail-1.4.21 folder to webmail  
# mv squirrelmail-1.4.21 webmail
 
7. Now change directory to webmail  
# cd webmail
 
8. We will now configure webmail....  
 #./configure
 

 
9. Save the changes and return to the main menu and then exit from webmail configuration..... Finally....
   # cd.. [for go to previous directory... now we will be at /var/www/ directory...]
   # chown -R www-data:www-data webmail/
   # cd /var/www/webmail/
   # chown -R www-data:www-data data/
   # chown -R www-data:www-data attach/
 
10. Restart the services,
   # /etc/init.d/apache2 restart
   # /etc/init.d/postfix restart
   # /etc/init.d/dovecot restart
 
If your squirrel mail open a download file instead opening the web interface install the following package and restart apache2.
 
# apt-get install apache2-mpm-prefork
# /etc/init.d/apache2 restart
 
Of course remove your browser's cache. Now go to web browser and type: http://192.168.0.2/webmail
 
ha ha ha you find the Squirrell mail login page...hopefully....
 

11. Auto-Redirect Squirrelmail to the index page # vim /var/www/index.html


http://192.168.1.1/webmail/

12. Increase squirrelmail attachment size:
By default Squirrel mail (webmail) has maximum attachment size limit 2MB. But in our daily mail transactions we need to send large files as attachment.
 
To increase the attachment size edit /etc/php5/apache2/php.ini file.
 
# vim /etc/php5/apache2/php.ini
upload_max_filesize = 2M [increase the size as you need]
post_max_size = 20M [increase the size as you need]
save and close.
 
Now restart apache.
#/etc/init.d/apache2 restart
 
Changing password and save company logo:
root@mail:~# apt-get install poppassd
root@mail:~# cd /var/www/webmail/
root@mail:~# wget http://www.squirrelmail.org/plugins/change_pass-2.7a-1.4.x.tar.gz
root@mail:~# tar -zxvf change_pass-2.7a-1.4.x.tar.gz
root@mail:~# cd ..
root@mail:~# ./configure
Move the plugin change_pass\94 from available plugins to installed plugins. Changing password option should be available in the options menu under squirrelmail.

Logo location: /var/www/webmail/images/sm_logo.png. If there is a problem, try rebooting the server.
 
13. webmail changepassword in linux
I was working with squirrelmail change password plugin on RHEL 5. Though it works, I know, but unfortunately it was not working on that day. I have tried all the possible ways but failed. Then I have to go for alternate way and did changepassword on that server. Here is how I did it.
 
Download it on your server.
# wget  

untar the file:
# tar \96zxvf  changepassword-0.9.tar.gz
 
Now enter the directory do the following steps (I have a cgi-bin dir in /var/www):
# cd changepassword-0.9
# ./configure \96help
# ./configure --enable-cgidir=/var/www/cgi-bin --disable-smbpasswd --disable-squidpasswd
# make && make install
 
Now open the page with the follwing URL and change your password:
http:///cgi-bin/changepassword.cgi

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To make easier for user we have to change the path:
# mkdir /var/www/changepass
# cd /var/www/changepass
 
vim index.html
## type the following lines in this file and save it ##


cgi-bin/changepassword.cgi">



Now restart the apache service and open the below URL:
http:///changepass/
****Note: If you download squirrelmail by apt-get install method it may occur some difficulties later on.
But the way is: # apt-get install squirrelmail  (To download & install) # squirrelmail-configure  (To configure)