Add-ons
Message Composition
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Mail Merge
Create and Save or Send Multiple Individual and Personalized Messages from a Draft
64,284 users
Most Popular See all »
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True "Send Later" functionality to schedule the time for sending an email.72,832 users -
Switch the signature on/off or choose a new one from your predefined set.64,536 users -
Create and Save or Send Multiple Individual and Personalized Messages from a Draft64,284 users -
Extension to mimic Outlook Express Stationery.
Allow you to use HTML files as templates for mail. Also allow custom template in replies or forwarded mail!29,561 users -
ThunderPEC semplifica la gestione della Posta Elettronica Certificata (PEC) e delle comunicazioni PCT e FatturaPA in Thunderbird.25,476 users -
SmartTemplate4 offers an easy way to automatically create customized replies by auto-inserting various mail headers. Templates can be created for every account as well as for the default (all email accounts). Also supports the Stationery Add-on.18,173 users
Top Rated See all »
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Default "Reply" functionality pays attention to "Reply-To" in original email413 users -
Thunderbird HTML editor. This add-on adds a HTML tab to the composition window where you can see and edit the HTML source of the message.5,121 users -
True "Send Later" functionality to schedule the time for sending an email.72,832 users
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SmartTemplate4 offers an easy way to automatically create customized replies by auto-inserting various mail headers. Templates can be created for every account as well as for the default (all email accounts). Also supports the Stationery Add-on.18,173 users
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Category manager for Thunderbird contacts, also allows to send an email to all members of a category (categories can be used as contact groups).4,762 users
Recently Added See all »
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Uploads your large attachments to your Box instead of sending them by email.0 users -
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Lightweight add-on that automatically copies any highlighted text to clipboard.14 users
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This is a version of 'Use BCC Instead' updated for Thunderbird 64 and above.
It prevents you accidentally sending an email to a large number of recipients without hiding their addresses from each other by using BCC.1 user -
Uploads your large attachments to your Dropbox instead of sending them by email. This uses Thunderbird's FileLink feature.420 users -
Shows a colorful border around the "New Message" window, so you can tell different identities apart.
Builds on the original BorderColors and the "GT" version, adding different border styles.1,077 users
See all 116 extensions in Message Composition »
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