Upload large attachments to your Cloud and send the link by email
Thunderbird HTML editor. This add-on adds a HTML tab to the composition window where you can see and edit the HTML source of the message.
Highlights selected text when composing emails. Default colour is yellow - other colours are available via Options.
(Works only during writing an e-mail, i.e. only in the compose window.)
Address bulk copy （アドレス一括コピー） Requires Restart
Thunderbird は Outlook のようにアドレス全選択からの「一括コピー」ができません。
Quickly choose one of the previously selected colors for a message text
Stop Ignoring Reply:To Requires Restart
Default "Reply" functionality pays attention to "Reply-To" in original email
Adds support for the X-Unsent header.
Check that number of non-BCC recipients does not exceed a parameter.
True "Send Later" functionality to schedule the time for sending an email.
Create and Save or Send Multiple Individual and Personalized Messages from a Draft
As-you-type phonetic conversion of text from one alphabet to another, as well as transliteration/detransliteration of selected text anywhere within documents. Supports multiple languages and custom transliteration schemes.
Identity Chooser helps you to always use the correct identity when composing a new email.
Warns if you send mail from or to a specified domain. If there are multiple accounts in your profile, you can isolate one so that you can't send mail to that domain from outside or vis versa without warning.
Remembers the language you use with a person or group of people, and switches the spellchecker language automatically for you next time. You do not have to do it manually any more. It remembers and switches it for you.
AVIM Requires Restart
Vietnamese-language input method editor (IME). Type diacritics directly into any Web page, Web app, or dialog box. Convenient, comprehensive, secure.
Bộ gõ tiếng Việt cho phép đặt dấu trực tiếp vào bất kỳ trang Web, ứng dụng Web, hộp thoại.
Macro Template is to replace mail templates with macros for date formatting.
Allows you to use your Exchange email accounts that use Outlook Web Access (OWA) with Thunderbird
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.
Reply to Multiple Messages Requires Restart
Add menu commands for replying to multiple messages at the same time.
Outlook style headers and few goodies for Thunderbird.