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.
4,135 users -
*cloud - FileLink for Nextcloud and ownCloud
Upload large attachments to your Cloud and send the link by email
40,902 users
Most Popular See all »
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True "Send Later" functionality to schedule the time for sending an email.129,879 users -
Create and Save or Send Multiple Individual and Personalized Messages from a Draft82,965 users -
Check your emails for spelling and grammar issues79,965 users -
Switch the signature on/off or choose a new one from your predefined set.60,818 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.)57,853 users -
Securely encrypt and upload large attachments to any Send service instance (formerly Firefox Send).54,919 users
Top Rated See all »
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Quickly choose one of the previously selected colors for a message text1,976 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。478 users -
Macro Template is to replace mail templates with macros for date formatting.640 users
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Default "Reply" functionality pays attention to "Reply-To" in original email60 users
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Allows you to use your Exchange and Office365 email account with Thunderbird using Outlook Web Access (OWA).44,225 users -
Create and Save or Send Multiple Individual and Personalized Messages from a Draft82,965 users
Recently Added See all »
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A simple and reliable browser alarm extension. Create alarm and never miss important tasks, meetings, or events6 users -
Detección en tiempo real de spam y phishing en Zimbra. Bloquea enlaces peligrosos con Safe Browsing, PhishTank y URLhaus.2 users -
Rewrite Thunderbird compose drafts with LLM providers while preserving inline media.7 users -
Visualize your inbox with interactive sunburst charts. Analyze emails by sender, domain, size, and timeline. Bulk select, review, and clean up — move to Trash or any folder. Privacy-first: all processing stays local on your device.25 users -
Saves a copy of sent messages in the current folder or any selectable folder instead of the default Sent folder.
This add-on is the successor of 'Copy Sent to Current', which is no longer supported39 users
See all 328 extensions in Message Composition »
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