There are many options that can be modified in this file. These are the suggested bare minimum variables to change.
Change this to your organization's name.
$org_name = 'YOUR_ORGANIZATION';
Change this to the title you would like shown on the SquirrelMail web page.
$org_title = 'YOUR_TITLE $version';
Change this to the mail domain that is being served by SquirrelMail.
$domain = 'YOUR_MAIL_DOMAIN.com';
Define your SMTP server. This is the name of the server running the Postfix MTA for your mail domain. If Postfix is running on the same server as SquirrelMail then this would be 'localhost'. If it is another server then enter 'SERVERNAME.com'.
$smtpServerAddress = 'localhost';
Define your IMAP server. We always have SquirrelMail running on the same server as IMAP so this will always be 'localhost'.
$imapServerAddress = 'localhost';
Define the IMAP server type. The IMAP package in EnGarde Secure Community 3.0 is 'Washington University' so use 'wu' here.
$imap_server_type = 'wu';
The only PHP configuration that will be mentioned here is the maximum allowable file size to upload. This in defined in /etc/php.ini with the variable 'upload_max_filesize' and the default is 2M. If you need to