PUBLIC MARKS with tags extension & mail

Mail Avenger is a highly-configurable, MTA-independent SMTP server daemon. It lets users run messages through filters like ClamAV and SpamAssassin during SMTP transactions, so the server can reject mail before assuming responsibility for its delivery. Other unique features include TCP SYN fingerprint and network route recording, verification of sender addresses through SMTP callbacks, SPF (sender policy framework) as a general policy language, qmail-style control over both SMTP-level behavior and local delivery of extension addresses, mail-bomb protection, integration with kernel firewalls, and more.

“Seek” adds faceted browsing features to Mozilla Thunderbird and lets you search through your email more effectively.

Mail Badger is a plug-in for Apple's Mail.app that enhances the application's dock icon by allowing users to set up multiple "badges" that display message counts from different mailboxes or counts of messages that satisfy a wide range of conditions.

Archive email messages from Thunderbird to sugarCRM. Import and export Contacts. Use sugarCRM contacts and leads as a Thunderbird addressbook. Synchronization, keep your contacts updated. Create Sugar Objects: Contacts, Leads, Accounts, Cases. And more..

This is a Firefox extension that allows you to manage multiple Gmail accounts and receive new mail notifications. Displays account details including unread messages, saved drafts, spam messages, labels with new mail, space used, and new mail snippets.

Xnote est une extension pour le client mail Mozilla Thunderbird. Elle permet d'associer une note à un mail et apparaît à l'écran sous la forme d'un post-it lors d'un clique sur un mail annoté ou sur demande de l'utilisateur. Il est ainsi possible de compléter un mail par des informations extérieures.

Mozilla New Mail Icon is an extension which displays an icon in the system tray when new mail arrives in your Mozilla or Mozilla Thunderbird.