Add-ons
Message Composition
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SpamTester
SpamTester allows you to test the spam score of your email using popular anti-spam software (SpamAssassin, Rspamd...). This is useful to know if your email will fall into the recipient's spam (or even get your mail server blocked).
Resubmit
Stop Ignoring Reply:To
Requires Restart
Default "Reply" functionality pays attention to "Reply-To" in original email
CustomCSS
Allow the user to configure custom CSS that will be added to messages when edited
(new, reply and forward). The custom CSS will be added to a newly created <style>
element in the email's head.
replyTo
Requires Restart
Adds a menuitem to the Mail context Menu to Reply to a different Mailadress
EML-Editor
Addons to edit EML files and save your emails as EML file with their attachements.
Available on Github with MIT Licence :
https://github.com/pgpgeek/thunderbird-addon-eml-editor
One-Click Forward
Forward emails directly through a dropdown of predefined recipients.
Configure recipients in settings. Use the message toolbar button "Quick Forward" to open a dropdown with your recipients and forward directly, or hold Shift to edit first.
ThunderBird Ticker
Custom Sender Address and Reply
Requires Restart
Select sender mail address based on the recipient and reply with the same address
@Contact Mention
This add-on mimics the mentions behavior on Outlook when mentioning a contact with the '@' sign. The contact selected is added as a link in the email body as well as to the recipent list of the email.
Synnefo for Filelink
Requires Restart
Add Synnefo support to Thunderbird's Filelink feature.
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.
regimail
AddOn for sending regimail with Thunderbird on Windows, MacOS and Linux.
*IMPORTANT:*
In order to use this AddOn, you need to install the regify client on your system and configure it with a valid regify account.
Highlight External Addresses
Requires Restart
This extension helps to warn the user when composing a message to a mixed group of people both in and out of the sender's organization. External addresses are highlighted in orange as a reminder.
RM: EXTERNAL:
Requires Restart
Removes 'EXTERNAL: ' from the start of an email subject if it is preceded by 'RE:' or 'FWD:' (case insensitive). The removal is done after the 'Send' button is pressed.
BorderColors GT
Requires Restart
How many time you sent an email from your wrong email address?
This add-ons allows you assign a different color to the compose window border for each of your email addresses. So you can immediately view from what account are you writing.
Textmarker
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.)
HTML Source Editor
Allows to edit the source of the currently composed message. A simple alternative to ThunderHTMLedit.
NestedQuote RemoverTo create your own collections, you must have a Mozilla Add-ons account.
