Add-ons
Most Popular See all »
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Quickly generate mail filters on the fly, by dragging and dropping mails and analyzing their attributes. Create a filter in less than 10 seconds, it's as easy as: drag, click, click.
By popular demand, supports SORTING filters alphabetically.13,784 users -
Shows GMail labels in each message's headers panel. When using Thunderbird with a Gmail account, it is not possible to guess which Gmail labels a message was applied (and in which folders it can be found). This extension provides this information1,063 users -
Tagging messages by autocompletion
Quickly tag selected messages from a large list of existing tags using autocompletion, or create and add new tags, or clear them all.
Optionally tag incoming reply with tags of messages replied to.785 users -
Simplify email categorization - it will be easier for you and others to manage mail. Define the set of prefixes for all emails you send or let SubSwitch to autodiscover it. While writing insert prefix to the title - choose one from your set.391 users -
This Extension provides a framework for AI-powered email analysis. It processes incoming emails, sends them to a language model of your choice, and applies tags. This allows for sophisticated email classification and sorting.257 users
Top Rated See all »
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Enable you to arrange the tag sequences in their listbox.39 users -
Quickly generate mail filters on the fly, by dragging and dropping mails and analyzing their attributes. Create a filter in less than 10 seconds, it's as easy as: drag, click, click.
By popular demand, supports SORTING filters alphabetically.13,784 users -
Simplify email categorization - it will be easier for you and others to manage mail. Define the set of prefixes for all emails you send or let SubSwitch to autodiscover it. While writing insert prefix to the title - choose one from your set.391 users
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Shows GMail labels in each message's headers panel. When using Thunderbird with a Gmail account, it is not possible to guess which Gmail labels a message was applied (and in which folders it can be found). This extension provides this information1,063 users
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This is an extension function that classifies emails into multiple buckets using AI(the Bayesian filter) and tags them.121 users
Recently Added See all »
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Preen (to smooth or clean feathers) uses the lightning-fast, cheap and efficient decision making power of Jev to evaluate emails and apply tags. Requires your own OpenRouter or TypeSafe API key (ZDR is advised for privacy).2 users -
Show and manage real Gmail labels (Gmail API) in Thunderbird, and suggest Gmail filters. Requires your own free Google Cloud OAuth client.0 users -
Shows where and why a message looks like spam or phishing, right inside the message. All checks run on your PC; message contents never leave it.2 users -
Italian certified email (PEC) receipts and e-filing outcomes for Thunderbird: reads receipts and outcomes, shows delivery and filing status, tags messages and saves the case file. Everything stays local: no data leaves the computer.1 user -
Replaces Thunderbird's filter editor with one that supports regular expressions, nested AND / OR / NOT logic, and Unicode lookalike (homoglyph) detection. Runs on new mail in folders you choose. Collects nothing.3 users
See all 35 extensions in Tags »
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