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CWP: Configure Default Roundcube settings as you want

Few users doesn't satisfied with default Rouncube feature's , Sometimes they demand more features that's why we will change the default setting as we want .
I'm showing some changes in below :
Edit the file as follows
# vi /usr/local/cwpsrv/var/services/roundcube/config/

// Log successful/failed logins to /userlogins or to syslog
$config['log_logins'] = true;

// Log IMAP conversation to /imap or to syslog
$config['imap_debug'] = true;

// Log SMTP conversation to /smtp or to syslog
$config['smtp_debug'] = true;

$config['enable_installer'] = false;

// provide an URL where a user can get support for this Roundcube installation
$config['support_url'] = ''; 

// replace Roundcube logo with this image
// specify an URL relative to the document root of this Roundcube installation
// an array can be used to specify different logos for specific template files, '*' for default logo
// for example array("*" => "/images/roundcube_logo.png", "messageprint" => "/images/roundcube_logo_print.png")
$config['skin_logo'] = ''; 

// enforce connections over https
// with this option enabled, all non-secure connections will be redirected.
// set the port for the ssl connection as value of this option if it differs from the default 443
$config['force_https'] = true;

// tell PHP that it should work as under secure connection
// even if it doesn't recognize it as secure ($_SERVER['HTTPS'] is not set)
// e.g. when you're running Roundcube behind a https proxy
// this option is mutually exclusive to 'force_https' and only either one of them should be set to true.
$config['use_https'] = true; 

N.B: if you use this option to 'yes' then you must have valid SSL certificates 
for that respective domain.

// Brute-force attacks prevention.
// The value specifies maximum number of failed logon attempts per minute.
$config['login_rate_limit'] = 3;

// display software version on login screen
$config['display_version'] = true;

// Session lifetime in minutes
$config['session_lifetime'] = 10;

// X-Frame-Options HTTP header value sent to prevent from Clickjacking.
// Possible values: sameorigin|deny. Set to false in order to disable sending them
$config['x_frame_options'] = 'sameorigin'; 

// Password character set.
// If your authentication backend supports it, use "UTF-8".
// Otherwise, use the appropriate character set.
// Defaults to ISO-8859-1 for backward compatibility.
$config['password_charset'] = 'ISO-8859-1';

// Name your service. This is displayed on the login screen and in the window title
$config['product_name'] = 'DataHead Webmail'; 

// try to load host-specific configuration
// see for more details
$config['include_host_config'] = false;

// Set identities access level:
// 0 - many identities with possibility to edit all params
// 1 - many identities with possibility to edit all params but not email address
// 2 - one identity with possibility to edit all params
// 3 - one identity with possibility to edit all params but not email address
// 4 - one identity with possibility to edit only signature
$config['identities_level'] = 1;

// Mimetypes supported by the browser.
// attachments of these types will open in a preview window
// either a comma-separated list or an array: 'text/plain,text/html,text/xml,image/jpeg,image/gif,image/png,application/pdf'
$config['client_mimetypes'] = null; # null == default

// Absolute path to a local mime.types mapping table file.
// This is used to derive mime-types from the filename extension or vice versa.
// Such a file is usually part of the apache webserver. If you don't find a file named mime.types on your system,
// download it from
$config['mime_types'] = null; 

// These cols are shown in the message list. Available cols are:
// subject, from, to, fromto, cc, replyto, date, size, status, flag, attachment, 'priority'
$config['list_cols'] = array('subject', 'status', 'fromto', 'date', 'size', 'flag', 'attachment');

// the default locale setting (leave empty for auto-detection)
// RFC1766 formatted language name like en_US, de_DE, de_CH, fr_FR, pt_BR
$config['language'] = en_US;

// use this format for date display (date or strftime format)
$config['date_format'] = 'd-m-Y';

// use this format for detailed date/time formatting (derived from date_format and time_format)
$config['date_long'] = 'd-m-Y H:i'; 

// store draft message is this mailbox
// leave blank if draft messages should not be stored
// NOTE: Use folder names with namespace prefix (INBOX. on Courier-IMAP)
$config['drafts_mbox'] = 'Drafts';

// store spam messages in this mailbox
// NOTE: Use folder names with namespace prefix (INBOX. on Courier-IMAP)
$config['junk_mbox'] = 'Junk';

// store sent message is this mailbox
// leave blank if sent messages should not be stored
// NOTE: Use folder names with namespace prefix (INBOX. on Courier-IMAP)
$config['sent_mbox'] = 'Sent';

// move messages to this folder when deleting them
// leave blank if they should be deleted directly
// NOTE: Use folder names with namespace prefix (INBOX. on Courier-IMAP)
$config['trash_mbox'] = 'Trash';

// automatically create the above listed default folders on user login
$config['create_default_folders'] = true; 

// protect the default folders from renames, deletes, and subscription changes
$config['protect_default_folders'] = true;

// if in your system 0 quota means no limit set this option to true
$config['quota_zero_as_unlimited'] = true;

// Use this char/string to separate recipients when composing a new message
$config['recipients_separator'] = ',';

// Use this charset as fallback for message decoding
$config['default_charset'] = 'ISO-8859-1';

// skin name: folder from skins(larry or classic)/
$config['skin'] = 'larry';

// use this timezone to display date/time
// valid timezone identifers are listed here:
// 'auto' will use the browser's timezone settings
$config['timezone'] = 'Asia/Dhaka'; 

// prefer displaying HTML messages
$config['prefer_html'] = true;

// display remote inline images
// 0 - Never, always ask
// 1 - Ask if sender is not in address book
// 2 - Always show inline images
$config['show_images'] = 2;

// compose html formatted messages by default
// 0 - never,
// 1 - always,
// 2 - on reply to HTML message,
// 3 - on forward or reply to HTML message
// 4 - always, except when replying to plain text message
$config['htmleditor'] = 1;

// default setting if preview pane is enabled
$config['preview_pane'] = true; 

// When replying:
// -1 - don't cite the original message
// 0 - place cursor below the original message
// 1 - place cursor above original message (top posting)
$config['reply_mode'] = 1;

// Show signature:
// 0 - Never
// 1 - Always
// 2 - New messages only
// 3 - Forwards and Replies only
$config['show_sig'] = 1;

// By default the signature is placed depending on cursor position (reply_mode).
// Sometimes it might be convenient to start the reply on top but keep
// the signature below the quoted text (sig_below = true).
$config['sig_below'] = false; 

// Directly delete messages in Junk instead of moving to Trash
$config['delete_junk'] = false;

// Sets default mode of Forward feature to "forward as attachment"
$config['forward_attachment'] = false;

// Defines address book (internal index) to which new contacts will be added
// By default it is the first writeable addressbook.
// Note: Use '0' for built-in address book.
$config['default_addressbook'] = null; 

// Default font for composed HTML message.
// Supported values: Andale Mono, Arial, Arial Black, Book Antiqua, Courier New,
// Georgia, Helvetica, Impact, Tahoma, Terminal, Times New Roman, Trebuchet MS, Verdana
$config['default_font'] = 'Verdana';

// Default font size for composed HTML message.
// Supported sizes: 8pt, 10pt, 12pt, 14pt, 18pt, 24pt, 36pt
$config['default_font_size'] = '10pt';

// Default behavior of Reply-All button:
// 0 - Reply-All always
// 1 - Reply-List if mailing list is detected
$config['reply_all_mode'] = 0; 

To know more about GUI Features of Roundcube webclient:
Link 1
Link 2