Privacy and Security

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Confirm-Address

Confirm E-mail address before sending mail

Rated 5 out of 5 stars (65)
28,914 users
Updated April 14, 2021

Rspamd-spamness

Rspamd spam filtering system score visualization.

Rated 4 out of 5 stars (6)
539 users
Updated April 1, 2021

MailHops

MailHops maps the route an email took to get to you. Displaying the senders location, weather, user-agent and authentication used.

Rated 4 out of 5 stars (34)
1,974 users
Updated March 30, 2021

Mail Merge

Create and Save or Send Multiple Individual and Personalized Messages from a Draft

Rated 5 out of 5 stars (194)
67,207 users
Updated March 10, 2021

SPAM Check for OCN

- SPAM Header Checker for OCN(Japanese Internet Provider)
- This plugin looks at the header of the mail and assigns a "junk mail" mark.
- Only if the header (X-CON-SPAM-CHECK) of the mail is set to 100%, it will be marked as "spam".

Not yet rated
11 users
Updated March 7, 2021

AlertSwitch

Turn on/off the alert shown when new message arrives.

Rated 4 out of 5 stars (3)
675 users
Updated Feb. 27, 2021

Logout

This extension adds "Logout" to the folders/accounts context menu.

After you "Logout" you will be asked again for passwords for this account (incoming and outgoing) without the need to restart thunderbird.

Rated 5 out of 5 stars (1)
114 users
Updated Feb. 17, 2021

Just Report It

Just Report It (https://justreport.it) is an email plugin which tackles spam the right way. Report emails straight to SpamCop, the Registrar, a custom email address or any combination in between!

Rated 5 out of 5 stars (4)
135 users
Updated Feb. 8, 2021

Unmangle Microsoft ATP Safelinks

Users of outlook.com and o365 who have Advanced Thread Protection enabled will have all URL's in emails changed to redirect them to an Microsoft filter before opening. This is a bad idea.

This plugin will change the URL back to the original value.

Rated 5 out of 5 stars (3)
325 users
Updated Jan. 11, 2021

Enigmail

OpenPGP message encryption and authentication for Thunderbird.

Rated 4 out of 5 stars (259)
76,721 users
Updated Jan. 1, 2021

Identity Chooser

Identity Chooser helps you to always use the correct identity when composing a new email.

Rated 5 out of 5 stars (125)
6,263 users
Updated Dec. 20, 2020

Check and Send

Check the message contents and addresses before you send the message...

Rated 4 out of 5 stars (40)
18,870 users
Updated Dec. 11, 2020

Signal Spam

Add simple functions to report spams or phishing to Signal Spam by one click.
The add-on will also alert you if you open a fraudulent e-mail (phishing).

Rated 3 out of 5 stars (139)
12,436 users
Updated Dec. 8, 2020

SPAMBEE

Report any unsollicited email (SPAM, Phishing, ...) to SPAMBEE.
Get an alert if you open an email containing a URL already known as fraudulent.
All reports are anonymized, no registration is required.

Rated 4 out of 5 stars (1)
127 users
Updated Dec. 8, 2020

WarnAttachment

WarnAttachment shows an additional dialog to confirm potentially dangerous attachments. Some attachments like executables etc. are completely blocked. This reduces the risk of malware especially for inexperienced users.

Rated 5 out of 5 stars (8)
2,118 users
Updated Dec. 5, 2020

DKIM Verifier Featured

Verifies the DKIM-Signature of an e-mail.

Rated 4 out of 5 stars (30)
12,562 users
Updated Nov. 23, 2020

Flex Confirm Mail

Confirm mail address and attachments based on flexible rules.

Rated 4 out of 5 stars (9)
10,777 users
Updated Nov. 18, 2020

Safelink removal

Replace URLs which have been rewritten by Office 365 Advanced Threat Protection with the original URL.

Not yet rated
76 users
Updated Nov. 9, 2020

Remote Content By Folder

Decide whether to allow or block remote content in messages by comparing the names of the folders in which they are located to configured regular expressions.

Rated 4 out of 5 stars (3)
102 users
Updated Oct. 29, 2020

ProtonMail Encryption Status

When using ProtonMail Bridge to integrate Mozilla Thunderbird withProtonMail, it's not easy to tell which emails were end-to-end (E2E) encrypted. This add-on puts an icon in the toolbar above every message to show you its encryption status.

Rated 5 out of 5 stars (1)
311 users
Updated Oct. 6, 2020