Message Composition
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Add contact to CC by mentioning in body with @
Use @ to mention somebody on an email to link and add to the CC.
Replaceholder
Replace placeholders with date and time as you type.
入力画面の件名、本文内の各プレースホルダを日時や曜日等の文字列に置換します。
Toggle Line Wrap
Toggle wrapping of long lines in the message composition window when writing plaintext messages. Wrapping can be controlled via a toolbar button and a keyboard shortcut.
To must occur only once
This add-on changes all but the first "to" to "cc" if there are multiple "to" when replying to an email.
TarotSignature Requires Restart
This version provides a custom button for the message composer.
You need to customize your toolbar of the message composer.
The signature is hard-coded into the source code.
The signature is NOT being inserted automatically on window-open.
Edit Message Encoding Fallback Requires Restart
Fallback to a safe encoding, if you are replying to a message with unsupported encoding like UTF-16LE. (workaround for the Bug 961983)
Copy Message ID
Adds a button to the message view toolbar to copy the message ID to the clipboard. This is useful when sending email replies via the command line.
One-by-One Forward Requires Restart
Highlight multiple emails, right-click, then select "One-by-One Forward". This extension will allow you to forward the selected emails, one-by-one, to the recipients you specify using your choice of attachment handling.
Reply to Multiple Messages Requires Restart
Add menu commands for replying to multiple messages at the same time.
Stop Ignoring Reply:To Requires Restart
Default "Reply" functionality pays attention to "Reply-To" in original email
Copiar Assunto Requires Restart
Adiciona um botão para copiar o Assunto do email selecionado para a área de transferência
Add a button to copy the Subject line of the selected email to the clipboard
Asciidoctor for Thunderbird Requires Restart
Type some text in your mail's body, hit the asciidoctor button and transform your mail into a pretty html5 asciidoctor document. Font awesome and code highlighting are enabled.
EasyRight2Left Requires Restart
Change direction from Left to Right and Right to Left for Persian, Arabic, Hebrew etc. This Thunderbird extension is based on ComposeRTF available in https://addons.thunderbird.net/en-US/thunderbird/addon/composertf/
Typical Reply Requires Restart
Provides ability to send/receive typical replies in a team.Provides ability to send/receive typical replies in a team.
PopMailListRecipients 2
Expands address book lists to recipients addresses in the compose window
PGPGeek
Quick & easy PGP encryption / decryption tool
* Save & use many public encryption keys to encrypt mail content
* Save & use many private decryption keys to decrypt mail content
Using openPGP.js
Open Source
https://github.com/pgpgeek/pgpgeek
Limit non-BCC recipients
Check that number of non-BCC recipients does not exceed a parameter.
Expand mailing lists
Adds an 'expand lists' button to the compose window. It replaces all mailing lists with their contacts.
FileLink Provider for OwnCloud and NextCloud
Uploads your large attachments to your OwnCloud or NextCloud server and instead inserts a public link into your email.
Transfer Immunity
Transfer Immunity is a fast and secure add-on and SaaS service for sharing and transferring files. This high-fidelity, SaaS-based platform allows users to send large files to different destinations as attachments with emails.
To create your own collections, you must have a Mozilla Add-ons account.