Add-ons
Message Composition
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Signature Switch
Switch the signature on/off or choose a new one from your predefined set.
65,201 users -
Grammar Checker
Checks grammar using LanguageTool.
10,535 users -
ThunderHTMLedit
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.
10,216 users
Most Popular See all »
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True "Send Later" functionality to schedule the time for sending an email.77,154 users -
Switch the signature on/off or choose a new one from your predefined set.65,201 users -
Create and Save or Send Multiple Individual and Personalized Messages from a Draft63,738 users -
Allows you to use your Exchange email accounts that use Outlook Web Access (OWA) with Thunderbird29,797 users -
Check the message contents and addresses before you send the message...19,856 users -
Confirm mail address and attachments based on flexible rules.15,706 users
Top Rated See all »
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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.10,216 users -
True "Send Later" functionality to schedule the time for sending an email.77,154 users
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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。2,004 users -
Default "Reply" functionality pays attention to "Reply-To" in original email415 users
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As-you-type phonetic conversion of text from one alphabet to another, as well as transliteration/detransliteration of selected text anywhere within documents. Supports multiple languages and custom transliteration schemes.63 users -
Create and Save or Send Multiple Individual and Personalized Messages from a Draft63,738 users
Recently Added See all »
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Upload large attachments to your Cloud and send the link by email1,101 users -
Uploads your large attachments to your OwnCloud or NextCloud server and instead inserts a public link into your email.528 users -
Toggle word wrapping and <PRE> element wrapping in the message composition and HTML display windows, respectively. Based on original version by Kaspar Brand.477 users
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It's an extension that changes the format of reply header.
You can choose between the standard Thunderbird reply header, a detailed reply header or a Customized reply header.
You can configure it in the Tools ->“Add-on Preferences -> changeQuote.648 users -
Uploads your large attachments to your Box instead of sending them by email.4,601 users -
Select sender mail address based on the recipient and reply with the same address11 users
See all 119 extensions in Message Composition »
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