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.
3,796 users -
*cloud - FileLink for Nextcloud and ownCloud
Upload large attachments to your Cloud and send the link by email
39,491 users
Most Popular See all »
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True "Send Later" functionality to schedule the time for sending an email.116,294 users -
Create and Save or Send Multiple Individual and Personalized Messages from a Draft76,257 users -
Check your emails for spelling and grammar issues74,028 users -
Switch the signature on/off or choose a new one from your predefined set.56,728 users -
Uploads your large attachments to your Dropbox instead of sending them by email. This uses Thunderbird's FileLink feature.51,616 users -
Securely encrypt and upload large attachments to any Send service instance (formerly Firefox Send).50,711 users
Top Rated See all »
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Quickly choose one of the previously selected colors for a message text1,847 users -
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。555 users -
Macro Template is to replace mail templates with macros for date formatting.607 users
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Default "Reply" functionality pays attention to "Reply-To" in original email64 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.104 users
Recently Added See all »
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Provides a compose button in Thunderbird that creates AI-powered email replies with OpenAI. Offers settings for API key, model choice, and customization options.9 users -
Quickly shorten links with your self-hosted YOURLS instance. Provides a toolbar button, context menu, and keyboard shortcut for a fast workflow.1 user -
TO欄・CC欄に複数のメールアドレスがある場合の誤送信を防止します。送信前に自動的にチェックし、複数アドレスが検出された場合は警告を表示して送信を停止します。BCC欄の使用を推奨し、プライバシー保護を支援します。2 users -
Ersetzt [[TODAY]] beim Senden durch das Datum im gewünschten Format.1 user
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Better reply to emails by extracting email addresses from the content of the message and allowing you to reply to them directly.
Made in collaboration with aski75.8 users -
LSP Rewrap cleans up plain-text emails by collapsing extra spaces, tabs, and other spacing issues—like older Thunderbird versions did. Use the toolbar button, Ctrl+Shift+R, or Tools → LSP-Rewrap while composing a plain-text message.9 users
See all 235 extensions in Message Composition »
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