Display Mail User Agent T Featured
Displays the mail program with which the selected mail was written
*This addon is compatible with Thunderbird after Web Extesnsions support. Since development and operation check are done on Daily, it may not work on normal Thunderbird.
DKIM Verifier Featured
Verifies the DKIM-Signature of an e-mail.
Persistent sticky notes associated to emails. You can fulltext search with constraints/email them/print/bookmark/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.
Thunderbird Conversations Featured
This addon provides a conversation view for Thunderbird, grouping messages together and allowing you to reply "inline" thus providing a more efficient workflow.
FileLink provider for WebDAV Featured
Uploads your large attachments to your WebDAV account instead of sending them by email.
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.
Automatically archives old mails (Improved version of the orginal Autoarchive Add-on)
*cloud - FileLink for Nextcloud and ownCloud Featured
Upload large attachments to your Cloud and send the link by email
To create your own collections, you must have a Mozilla Add-ons account.