Add-ons
Message Composition
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SmartTemplates
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.
3,605 users -
*cloud - FileLink for Nextcloud OpenCloud ownCloud
Upload large attachments to your Cloud and send the link by email
36,669 users
Most Popular See all »
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True "Send Later" functionality to schedule the time for sending an email.115,812 users -
Create and Save or Send Multiple Individual and Personalized Messages from a Draft73,993 users -
Check your emails for spelling and grammar issues73,144 users -
Switch the signature on/off or choose a new one from your predefined set.52,063 users -
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.)49,918 users -
Securely encrypt and upload large attachments to any Send service instance (formerly Firefox Send).48,712 users
Top Rated See all »
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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。
それを実現するためのアドオンです。397 users -
Macro Template is to replace mail templates with macros for date formatting.560 users
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Default "Reply" functionality pays attention to "Reply-To" in original email47 users
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Allows you to use your Exchange and Office365 email account with Thunderbird using Outlook Web Access (OWA).38,855 users -
Create and Save or Send Multiple Individual and Personalized Messages from a Draft73,993 users
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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.85 users
Recently Added See all »
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Translate compose messages with an OpenAI-compatible LLM before sending. Supports OPENAI protocol.0 users
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Improve your emails with AI right inside Thunderbird compose window. Supports OpenAI, Google Gemini, Groq, and self-hosted models. Click "Improve Writing" to refine tone, style, and formatting. Customizable prompts and settings. Privacy-friendly.0 users -
An easy visual table editor for Thunderbird's HTML composer, with drag selection, formatting, resizing, headers, templates and saved models.
Provided as-is; the author is not responsible for loss or unintended results.1 user -
Adds a button to Thunderbird's compose window for inserting saved templates from the corresponding email account, including their attachments, directly into a message.1 user -
Aktiviert automatisch die Zustellstatusbenachrichtigung (DSN) und/oder Lesebestätigung (MDN) für ausgehende E-Mails in Thunderbird.1 user
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Double-click a word to highlight all its occurrences - in the compose editor and in the message view.1 user
See all 373 extensions in Message Composition »
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