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.
3,549 users -
*cloud - FileLink for Nextcloud OpenCloud ownCloud
Upload large attachments to your Cloud and send the link by email
34,545 users
Most Popular See all »
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True "Send Later" functionality to schedule the time for sending an email.103,943 users -
Check your emails for spelling and grammar issues72,076 users -
Create and Save or Send Multiple Individual and Personalized Messages from a Draft68,457 users -
Switch the signature on/off or choose a new one from your predefined set.51,993 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.)49,376 users -
Securely encrypt and upload large attachments to any Send service instance (formerly Firefox Send).47,076 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。354 users -
Macro Template is to replace mail templates with macros for date formatting.547 users
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Default "Reply" functionality pays attention to "Reply-To" in original email50 users
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Allows you to use your Exchange and Office365 email account with Thunderbird using Outlook Web Access (OWA).38,912 users -
Create and Save or Send Multiple Individual and Personalized Messages from a Draft68,457 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.94 users
Recently Added See all »
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Resize inline images directly in Thunderbird messages with editable presets, and compress JPEG files manually or automatically without changing their displayed size.0 users -
Automatically compress email attachments into ZIP files by extension and size rules, before sending or right after you attach them.1 user -
Private notes and todos for every site, domain, or exact page path.5 users
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OpenClaw-powered writing and reading assistance for Thunderbird. Preview and apply draft improvements, translations, and summaries; summarize or reversibly translate received messages.1 user
See all 350 extensions in Message Composition »
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