My enabled plugins are (at the moment):
password, which is already included in the plugins folder
sieverules, which writes sieve scripts to filter the incoming mails (reject, move to a specific folders etc.). Note that to use this you must have Dovecot managesieve enabled.
quickrules. Adds a button to the message list to allow the quick creation of rules in the SieveRules plugin. Infomration from selected emails is used to prefile the new rule form.
sauprefs, which writes the spamassassin user preferences in the DB. The user will be allowed to create a black/white list, to adjust the required_score and so on.
markasjunk2. You can add the sender's email address to the blacklist, or run a command such as sa_learn. Requires sauprefs.
rcguard. This plugin logs failed login attempts and requires users to go through a reCAPTCHA verification process when the number of failed attempts go too high.
zipdownload. Adds an option to download all attachments to a message in one zip file, when a message has multiple attachments. Also allows the download of a selection of messages in one zip file and the download of entire folders.
- Context Menu. Adds context menus to the message list, folder list and address book.
Menu includes the abilities mark messages as read/unread, delete, reply
- autologon. Autologin from external Site e.g. (CMS, Portal ...)
- logout_redirect. Modified version to only redirect to the homepage (depending on the domain part of the default identity)
- newmail_notifier. can notify new mail focusing browser window and changing favicon, playing a sound and displaying desktop notification (using webkitNotifications feature).