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.
3,456 users -
*cloud - FileLink for Nextcloud and ownCloud
Upload large attachments to your Cloud and send the link by email
36,211 users
Most Popular See all »
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True "Send Later" functionality to schedule the time for sending an email.108,805 users -
Create and Save or Send Multiple Individual and Personalized Messages from a Draft70,414 users -
Check your emails for spelling and grammar issues68,854 users -
Switch the signature on/off or choose a new one from your predefined set.51,749 users -
Uploads your large attachments to your Dropbox instead of sending them by email. This uses Thunderbird's FileLink feature.48,288 users -
Securely encrypt and upload large attachments to any Send service instance (formerly Firefox Send).47,834 users
Top Rated See all »
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Quickly choose one of the previously selected colors for a message text1,741 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。459 users -
Macro Template is to replace mail templates with macros for date formatting.534 users
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Default "Reply" functionality pays attention to "Reply-To" in original email68 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.91 users
Recently Added See all »
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I missed an acoustic notification when an e-mail was sent and it seems (at least on MacOS) this is no native Thunderbird feature. So I created this quick, little AddOn which allows you to set an MP3 file that will be played if your message was sent.6 users -
This AddOn allows you to quickly resize images (like screenshots) you embed in a new mail to small, medium or large size with just a click in the composer window. This reduces e-mail size. The AddOn also estimates the size of your mail.15 users -
Provides a compose button in Thunderbird that creates AI-powered email replies with OpenAI. Offers settings for API key, model choice, and customization options.26 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.4 users
See all 237 extensions in Message Composition »
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