SquirrelMailはＰＨＰで記述されたWebMailです。
FedorａCoreに含まれるパッケージから日本語にも対応するようになりました。

１．SquirrelMailのインストール

# rpm -ihv squirrelmail-1.4.0-1.noarch.rpm
警告: squirrelmail-1.4.0-1.noarch.rpm: V3 DSA signature: NOKEY, key ID *****
Preparing... ########################################### [100%]
1:squirrelmail ########################################### [100%]

SquirrelMailのディレクトリ構造

/etc/squirrelmail/config.php	設定ファイル
/etc/httpd/conf.d/squirrelmail.conf	Apache設定ファイル
/usr/share/squirrelmail/*	ＰＨＰプログラム郡
/var/spool/squirrelmaill/attache/*	メールの添付処理

１−１Apacheの設定ファイル

# vi /etc/httpd/conf.d/squirrelmail.conf

記載の確認

#
# SquirrelMail is a webmail package written in PHP.
#

Alias /webmail /usr/share/squirrelmail

ＯＫであれば、Apacheの再起動

# /etc/rc.d/init.d/httpd reload
httpdを再読み込み中: [ OK ]

１−２Squirrelmailの設定（日本語表記）

# /usr/share/squirrelmail/config/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 (LDAP)
7. Message of the Day (MOTD)
8. Plugins
9. Database

D. Set pre-defined settings for specific IMAP servers

C. Turn color off
S Save data
Q Quit

Command >>1

SquirrelMail Configuration : Read: config.php (1.4.0)
---------------------------------------------------------
Organization Preferences
1. Organization Name : SquirrelMail
2. Organization Logo : ../images/sm_logo.png
3. Org. Logo Width/Height : (308/111)
4. Organization Title : SquirrelMail $version
5. Signout Page :
6. Default Language : en_US
7. Top Frame : _top
8. Provider link : http://www.squirrelmail.org/
9. Provider name : SquirrelMail

R Return to Main Menu
C. Turn color off
S Save data
Q Quit

Command >> 6

SquirrelMail attempts to set the language in many ways. If it
can not figure it out in another way, it will default to this
language. Please use the code for the desired language.

[en_US]: ja_JP
SquirrelMail Configuration : Read: config.php (1.4.0)
---------------------------------------------------------
Organization Preferences
1. Organization Name : SquirrelMail
2. Organization Logo : ../images/sm_logo.png
3. Org. Logo Width/Height : (308/111)
4. Organization Title : SquirrelMail $version
5. Signout Page :
6. Default Language : ja_JP
7. Top Frame : _top
8. Provider link : http://www.squirrelmail.org/
9. Provider name : SquirrelMail

R Return to Main Menu
C. Turn color off
S Save data
Q Quit

Command >> S
SquirrelMail Configuration : Read: config.php (1.4.0)
---------------------------------------------------------
Organization Preferences
1. Organization Name : SquirrelMail
2. Organization Logo : ../images/sm_logo.png
3. Org. Logo Width/Height : (308/111)
4. Organization Title : SquirrelMail $version
5. Signout Page :
6. Default Language : ja_JP
7. Top Frame : _top
8. Provider link : http://www.squirrelmail.org/
9. Provider name : SquirrelMail

R Return to Main Menu
C. Turn color off
S Save data
Q Quit

Command >> Q

１−３Squirrelmailへアクセス