How to Install and Setting Mail Server on Linux Debian

To install the mail server, just install squirrelmail, postfix, and courier-imap.

apt-get install postifx courier-imap squirrelmail

 And add this script to apache settings. I use this script :

cp /etc/squirrelmail/apache.conf /etc/apache2/conf.d/squirrelmail.conf

Then, edit it :

nano /etc/apache2/conf.d/squirrelmail.conf

Edit squirrelmail at first line with webmail .
Then, setting squirrelmail :

/etc/squirrelmail/conf.pl

SquirrelMail Configuration : Read: config.php (1.4.0)
---------------------------------------------------------
Main Menu --
1. Organization Preferences
2. Server Settings
3. Folder Defaults
4. General Options
5. Themes
6. Address Books
7. Message of the Day (MOTD)
8. Plugins
9. Database
10. Languages


D. Set pre-defined settings for specific IMAP servers


C Turn color on
S Save data
Q Quit


Command >> type = D





SquirrelMail Configuration : Read: config.php
---------------------------------------------------------
While we have been building SquirrelMail, we have discovered some
preferences that work better with some servers that don't work so
well with others. If you select your IMAP server, this option will
set some pre-defined settings for that server.


Please note that you will still need to go through and make sure
everything is correct. This does not change everything. There are
only a few settings that this will change.


Please select your IMAP server:
bincimap = Binc IMAP server
courier = Courier IMAP server
cyrus = Cyrus IMAP server
dovecot = Dovecot Secure IMAP server
exchange = Microsoft Exchange IMAP server
hmailserver = hMailServer
macosx = Mac OS X Mailserver
mercury32 = Mercury/32
uw = University of Washington's IMAP server


quit = Do not change anything
Command >> type = courier











SquirrelMail Configuration : Read: config.php
---------------------------------------------------------
While we have been building SquirrelMail, we have discovered some
preferences that work better with some servers that don't work so
well with others. If you select your IMAP server, this option will
set some pre-defined settings for that server.


Please note that you will still need to go through and make sure
everything is correct. This does not change everything. There are
only a few settings that this will change.


Please select your IMAP server:
bincimap = Binc IMAP server
courier = Courier IMAP server
cyrus = Cyrus IMAP server
dovecot = Dovecot Secure IMAP server
exchange = Microsoft Exchange IMAP server
hmailserver = hMailServer
macosx = Mac OS X Mailserver
mercury32 = Mercury/32
uw = University of Washington's IMAP server


quit = Do not change anything
Command >> courier


imap_server_type = courier
default_folder_prefix = INBOX.
trash_folder = Trash
sent_folder = Sent
draft_folder = Drafts
show_prefix_option = false
default_sub_of_inbox = false
show_contain_subfolders_option = false
optional_delimiter = .
delete_folder = true


Press any key to continue... <-- press a key




SquirrelMail Configuration : Read: config.php (1.4.0)
---------------------------------------------------------
Main Menu --
1. Organization Preferences
2. Server Settings
3. Folder Defaults
4. General Options
5. Themes
6. Address Books
7. Message of the Day (MOTD)
8. Plugins
9. Database
10. Languages


D. Set pre-defined settings for specific IMAP servers


C Turn color on
S Save data
Q Quit


Command >> type = S







SquirrelMail Configuration : Read: config.php (1.4.0)
---------------------------------------------------------
Main Menu --
1. Organization Preferences
2. Server Settings
3. Folder Defaults
4. General Options
5. Themes
6. Address Books
7. Message of the Day (MOTD)
8. Plugins
9. Database
10. Languages


D. Set pre-defined settings for specific IMAP servers


C Turn color on
S Save data
Q Quit


Command >> type = Q





Then, edit postfix settings at :

nano /etc/postfix/main.cf

Setting with your own setting.

Then, restart apache2, postfix, and courier-imap.

/etc/init.d/apache2 restart

/etc/init.d/postifx restart

/etc/init.d/courier-imap restart

Then, test with your client. Example : http://192.168.0.1/webmail or  http://example.yourdomain/webmail
If you're correct in setting, you will see like this :