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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).

Not yet rated
217 users

Open in browser

A context menu item to open the links associated with feed items in the default browser and then mark them as read.

Rated 5 out of 5 stars (1)
291 users

Archive old messages

A context menu item to archive all messages than older than a given duration.

Not yet rated
397 users

ReplyAsOriginalRecipientUp

When you reply to a mail sent to your personalized address (postfix/qmail/gmail extensions) such as john.doe+contactname@example.com, "From:" is replaced by your personalized address rather than your simple address.

Rated 4 out of 5 stars (8)
212 users

Aify

Rewrite or generate text based on promps using OpenAI's API.

Configure on settings page (make sure to save) and start to use when writing your emails!

You must have a payment method on record with OpenAI and an API key. OpenAI charge for use.

Rated 4 out of 5 stars (9)
396 users

Owl for Exchange

Allows you to use your Exchange and Office365 email account with Thunderbird using Outlook Web Access (OWA).

Rated 5 out of 5 stars (195)
47,842 users

FileLink Provider for Box

Uploads your large attachments to your Box instead of sending them by email.

Rated 3 out of 5 stars (12)
13,930 users

TUD-CERT Phishing Report

Adds a phishing report button to the toolbar to enable members of Technische Universität Dresden to report suspicious e-mails to TUD-CERT with just a few clicks. If desired, an optional comment can be entered upon each report.

Not yet rated
147 users

Contact Finder

Autocomplete a list of contacts when sending a message by searching their name in the address book.

Not yet rated
386 users

ScrollAnywhere

Scroll without touching the scroll-bar!
Press Middle (Right / Left) mouse button anywhere on the page to scroll just like with scrollbar.

Features also:
- "grab and drag" scrolling
- customizable scrollbars!
- the Momentum auto-scroll

Rated 5 out of 5 stars (1)
328 users

Netiquette checker and wrapper

RFC 1855 compatible as well as Epita compatible.

This Addon provide a mail checker and an auto 72 column wrapper.
What is checked:
- Subject
- Greeting
- Body
- Salutation
- Quoting
- Signature

Rated 3 out of 5 stars (1)
39 users

Seafile Filelink

A FileLink provider

With it you can store attachments on a seafile share

Rated 4 out of 5 stars (3)
167 users

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

Not yet rated
361 users

Sender Domain

Adds optional columns to the messages pane.
Example : "abc@example.com"
* domain column -- "example.com"
* reverse domain column -- "com.example"
Bulk organize your messages by domain (eg. remove spam, back up, separate in folders)

Rated 5 out of 5 stars (9)
115 users

Open Tab

Link open in new tab.

Rated 5 out of 5 stars (6)
505 users

Bug Opener

Open GitHub, GitLab, Bitbucket, Bugzilla and Jira bug/issue numbers.

Rated 5 out of 5 stars (1)
50 users

AI Grammar

Helps you write emails with the Llama3 LLM (offline). Corrects grammar mistakes in your draft email.

Rated 5 out of 5 stars (1)
113 users

SCMenu

Supplementary compose menus to reply to a message by including its original attachments and to create a new email to the recipients of an existing message.

Not yet rated
14 users

Get Map for Thunderbird

The "Get Map" button from the old address book is missing in Thunderbird 102 and 115, this extension puts it back. OpenStreetMap and Google Maps are both available. OpenStreetMap is configured by default and can be changed in the Add-ons Manager.

Rated 4 out of 5 stars (3)
330 users

Reply All Button

Add a "Reply All" button which never behaves like "Reply List". Intended to replace the Smart Reply button to avoid accidentally performing Reply List behavior.

Rated 5 out of 5 stars (1)
4 users