...

// log driver:  'syslog' or 'file'.
$rcmail_config['log_driver'] = 'syslog';

...
// TCP port used for IMAP connections
$rcmail_config['default_port'] = 993;

...

// IMAP AUTH type (DIGEST-MD5, CRAM-MD5, LOGIN, PLAIN or empty to use
// best server supported one)
$rcmail_config['imap_auth_type'] = null;

...

// SMTP port (default is 25; 465 for SSL)
// quand à nous, nous préférons le port "submission", protégé par TLS
$rcmail_config['smtp_port'] = 587;

...

// SMTP AUTH type (DIGEST-MD5, CRAM-MD5, LOGIN, PLAIN or empty to use
// best server supported one)
$rcmail_config['smtp_auth_type'] = 'PLAIN';

...

// THIS OPTION WILL ALLOW THE INSTALLER TO RUN AND CAN EXPOSE SENSITIVE CONFIG DATA.
// ONLY ENABLE IT IF YOU'RE REALLY SURE WHAT YOU'RE DOING!
$rcmail_config['enable_installer'] = false;

...

// 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
$rcmail_config['force_https'] = true;


...

// automatically create a new Roundcube user when log-in the first time.
// a new user will be created once the IMAP login succeeds.
// set to false if only registered users can use this service
$rcmail_config['auto_create_user'] = true;


...

// don't allow these settings to be overriden by the user
$rcmail_config['dont_override'] = array('logout_purge','drafts_mbox','junk_mbox','sent_mbox','trash_mbox');

...

// List of active plugins (in plugins/ directory)
// Attention, les plugins doivent être présent et configurés
// avant d'être listés ici
$rcmail_config['plugins'] = array('fail2ban','archive','markasjunk2','password','quickrules','keyboard_shortcuts','jqueryui','sieverules','compose_addressbook');

...

// 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)
$rcmail_config['drafts_mbox'] = 'Drafts';

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

// display these folders separately in the mailbox list.
// these folders will also be displayed with localized names
// NOTE: Use folder names with namespace prefix (INBOX. on Courier-IMAP)
$rcmail_config['default_imap_folders'] = array('INBOX', 'Drafts', 'Sent', 'Junk', 'Trash');

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

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

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

...

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

...

// compose html formatted messages by default
// 0 - never, 1 - always, 2 - on reply to HTML message only 
// autant favoriser les bonnes pratiques
$rcmail_config['htmleditor'] = 0;

...

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

...

// Clear Trash on logout
$rcmail_config['logout_purge'] = true;

...

// Set to true to never delete messages immediately
// Use 'Purge' to remove messages marked as deleted
$rcmail_config['flag_for_deletion'] = 'Purge';

...

// If true all folders will be checked for recent messages
// utile puisque nous utilisons SIEVE
$rcmail_config['check_all_folders'] = true;

...

// 'Delete always'
// This setting reflects if mail should be always deleted
// when moving to Trash fails. This is necessary in some setups
// when user is over quota and Trash is included in the quota.
$rcmail_config['delete_always'] = true;

...