[sjau]

That's how I have my config:

$domain                 = 'domain.com';
$imapServerAddress      = 'localhost';
$imapPort               = 143;
$useSendmail            = false;
$smtpServerAddress      = 'localhost';
$smtpPort               = 25;
$sendmail_path          = '/usr/sbin/sendmail';
$sendmail_args          = '-i -t';
$pop_before_smtp        = false;
$imap_server_type       = 'courier';
$invert_time            = false;
$optional_delimiter     = 'detect';
$encode_header_key      = '';

$default_folder_prefix          = 'INBOX.';
$trash_folder                   = 'Trash';
$sent_folder                    = 'Sent';
$draft_folder                   = 'Drafts';
$default_move_to_trash          = true;
$default_move_to_sent           = true;
$default_save_as_draft          = true;
$show_prefix_option             = false;
$list_special_folders_first     = true;
$use_special_folder_color       = true;
$auto_expunge                   = true;
$default_sub_of_inbox           = true;
$show_contain_subfolders_option = false;
$default_unseen_notify          = 2;
$default_unseen_type            = 1;
$auto_create_special            = true;
$delete_folder                  = false;
$noselect_fix_enable            = false;