squirrelmail - http://rimuhosting.com/

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Installing WebMail: SquirrelMail

Do you want to send email and look at your email from a web browser? Do you need to access email when you are away from your regular PC? Then you may wish to setup a web based mail client. Here is how:

Run: apt-get install squirrelmail

Squirrelmail needs an IMAP server to operate. Otherwise you will get an error like Error connecting to IMAP server: localhost.111 : Connection refused. So ensure that dovecot is running (see above).

Restart httpd (so it will load in /etc/httpd/conf.d/squirrelmail.conf):
/etc/init.d/xinetd restart
/etc/init.d/httpd restart

If you installed SquirrelMail onto a Debian server then you may need to add this alias line to your apache conf file: Alias /webmail/ "/usr/share/squirrelmail/"

Now browse to http://yourip/webmail/index.php and you should be at a webmail prompt.