SmartTemplates offers an easy and powerful way to automatically create customized replies by auto-inserting various mail headers. Templates can be created for every mail identity, Stationery files can now be imported and used directly.
Upload large attachments to your Cloud and send the link by email
Archiviert E-Mails automatisch (Verbesserte Version vom "Autoarchive" Add-on)
Verifies the DKIM-Signature of an e-mail.
Uploads your large attachments to your WebDAV account instead of sending them by email.
Persistent sticky notes for Thunderbird associated to mails. You can email them/print/copy to clipboard.
If you have a large screen, you can even display the notes outside of TB's main window, so it won't hide anything.
A new Thunderbird address book based on the CardDAV and vCard standards.
This addon provides a conversation view for Thunderbird, grouping messages together and allowing you to reply "inline" thus providing a more efficient workflow.