# IMAP Folder Configuration

La boîte de dialogue de configuration des dossiers vous permet de configurer des jeux complets de boîtes aux lettres sur des serveurs IMAP distants. La configuration est séparée en deux volets : Base et Avancé.

# Configuration de base d'un répertoire IMAP

L'onglet Base de la configuration des répertoires IMAP est probablement le seul volet que vous serez amené à remplir.

Le nom de la boîte aux lettres est le nom du nœud racine qui s'affiche dans l'arborescence des boîtes aux lettres sur le côté gauche.

Le serveur est le nom d'hôte ou l'adresse IP du serveur IMAP.

Le nom d'utilisateur est le nom de celui ayant droit d'accès au serveur IMAP.

Certains serveurs autorisent un accès anonyme aux serveurs d'informations ou aux archives des listes de diffusion. Cochez cette case si vous souhaitez utiliser ce mode - vous n'aurez pas à fournir de mot de passe.

Le mot de passe est le mot de passe autorisant l'accès au serveur IMAP.

Cette case à cocher permet de choisir toutes les boîtes aux lettres sur le serveur ou seulement celles auxquelles vous êtes inscrit.

Prefix is the root mailbox on the server. You may leave it empty if you want to show all the folders on your server but if your IMAP server stores also other kind of files you may specify for instance “mail”.

# Configuration avancée de répertoire IMAP

Il est parfois nécessaire d'ajuster la configuration du répertoire de façon à assurer une connexion sûre, de s'adapter aux limitations du serveur ou simplement d'améliorer les performances. Ces fonctionnalités se trouvent dans l'onglet Avancé de la configuration de répertoire IMAP.

The Use SSL check box should be active if the connection is to be made to IMAPS service on port 993. Connection to this port will be encrypted from the start. Not all servers provide this service - many provide only negotiated TLS encryption.

The Use TLS option list determines instruct balsa how to negotiate the TLS encryption. Balsa can never attempt to negotiate it, can start TLS encryption whenever it is supported by server, or can abort the connection if TLS is inavailable or fails for some reason.

Max. number of connections limits the number of concurrent connections open to the IMAP server. A number around 15-40 is a sane option as it avoids time-consuming and load-creating reselections of imap mailboxes. Some IMAP servers -- notably Courier -- limit the number of connections open from single IP number to 4 by default. The limit in balsa has to be in such a case adjusted accordingly.

The Enable persistent cache check box chooses whether Balsa should try to store downloaded messages between sessions or throw them away when it is closed. The optimal choice depends on the local configuration. If the connection to the IMAP server is slow and local storage in the home directory fast and cheap, it is recommended to enable persistent message cache. If the home directory is slow (eg. NFS-mounted) and the connection to the imap server - fast, persistent cache becomes just a burden and should be disabled.

The Use IDLE command check box chooses whether Balsa should try to use IDLE command when available. With this command, some servers notify immediately when a new command arrives. Also, this command may reduce the amount of network traffic. There are some downsides, too: some firewalls do not track IMAP connections correctly and will incorrectly interrupt a session in an IDLE state. In particular, home-grade network routers with NAT translation have notoriously this bug. In such case, it may be safer to disable this command.

The Enable bug workarounds check box makes Balsa work even with an IMAP server that cannot provide selected message parts. Balsa in such a case will try to fetch entire messages instead.

The Use STATUS for mailbox checking check box enables a more thorough but potentially more expensive way of checking mailboxes on IMAP server. This method can be consume many resources on the server and should be used only on IMAP servers that have optimized STATUS command.

# Propriétés du sous-dossier IMAP

The subfolder properties dialog allows you to manage folders on remote IMAP servers. Specifically, you can create a new subfolder, rename an existing subfolder, or move a subfolder within the folder tree.

Folder name is how the folder is shown in the mailbox tree on the left side.

Subfolder of indicates the immediate parent of the folder.

When the dialog is opened from File New Remote IMAP subfolder , you can enter the folder name and browse IMAP trees to find the parent folder. If you had already selected a mailbox in an IMAP tree, only that tree is shown for browsing; otherwise, all IMAP trees will be shown.

When the dialog is opened from Mailbox Edit with an IMAP folder selected, or by right-clicking on an IMAP mailbox and selecting Properties…, the mailbox may be:

renommée, en modifiant le nom du répertoire,

déplacée, en parcourant un répertoire parent dans la même arborescence.