Tategaki allows vertical writing-mode on mail compose window.
Customize background-color of the recipient address fields for each recipient types of To:, Cc:, Bcc:.Customize background-color of the recipient address fields for each recipient types of To:, Cc:, Bcc:.
Inserts links from local files via drag and drop on the composition window.
To detect file encoding of attachments, this forces to Thunderbird to use an encoding detector for a specific locale instead of the generic one.
AutoCorrect for the Compose window.
Macro Template No Restart
Macro Template is to replace mail templates with macros for date formatting.
This add-on checks to sender identity when send a message.
Adds a button to send an email and archive the original message.
Get messages for the account which is bound to the identity then send the message when you click the toolbar button or the menu item. If your SMTP sever authenticates using POP(IMAP) before SMTP, the extension is useful.
Adds support for the X-Unsent header.
Add a button to the email composition toolbar, which lets you insert an ethical signature.
Implement the "Sensitivity" header for outgoing messages (described in RFC 4021 section 2.1.55).
This allows the user to select Private / Personal / Company-Confidential (or none) for an outgoing message.
This extension makes it very easy to generate and attach stamps to outgoing mail. It also automatically detects and verifies stamps on incoming emails. The MBound algorithm requires a 16MB fixed table to work, HashCash is more CPU intense.
RemindIt No Restart
Help in reminding mails to be answer or sent again. Choose a reminder date for each received or send message that are highlighted in the message list, depending on their status (expired, soon to exprire, to be reminded). Sending a reminder is eased.
Updates a given signature file in regular intervals.
This is a Thunderbird addon that lets you customize the behavior of the IMAP draft unread messages. No more new mail notifications for your drafts!!
Adds a menuitem to the Mail context Menu to Reply to a different Mailadress
Email organized around the people you care about.
Extension for creating support tickets based on mail.