Auto Resize Image Reinício necessário

Resizer for inline and attachment images (JPEG, PNG, BMP and GIF image formats).
All platforms are supported (Windows, Linux and Macintosh).

Mail Merge

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

Enviar mais tarde

Funcionalidade do “Enviar mais tarde” para marcar a hora de envio

Signature Switch

Switch the signature on/off or choose a new one from your predefined set.

MEGAbird Reinício necessário

Add MEGA support to Thunderbird's Filelink feature.

Stationery Reinício necessário

Extension to mimic Outlook Express Stationery.
Allow you to use HTML files as templates for mail. Also allow custom template in replies or forwarded mail!

ThunderPEC Reinício necessário

ThunderPEC semplifica la gestione della Posta Elettronica Certificata (PEC) e delle comunicazioni PCT e FatturaPA in Thunderbird.

Emoji

Add emojis to your e-mails.

Check and Send

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

SmartTemplates Em destaque

SmartTemplates offers an easy and powerful way to automatically create customized replies by auto-inserting various mail headers. Templates can be created for every mail identity, Stationery files can now be imported and used directly.

Automatic Dictionary

Remembers the language you use with a person or group of people, and switches the spellchecker language automatically for you next time. You do not have to do it manually any more. It remembers and switches it for you.

FlexConfirmMail

Confirm mail address and attachments based on flexible rules.

(This project was renamed from "Flex Confirm Mail" to "FlexConfirmMail", due to a branding reason.)

Nextcloud for Filelink Reinício necessário

"Nextcloud for Filelink" is an Open Source Thunderbird extension which makes it easy to send large attachments with Thunderbird by uploading them first to a Nextcloud server and by then inserting the link into the body of your email.

Markdown Here Reinício necessário

Write your email in Markdown, then make it pretty.

CategoryManager

Category manager for Thunderbird contacts, also allows to send an email to all members of a category (categories can be used as contact groups).

Emoji Menu Reinício necessário

Adds the ability to easily insert emojis into your composed messages in Thunderbird.

Shrunked Image Resizer

ReplyWithHeader

Outlook style headers and few goodies for Thunderbird.

Transliterator

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.

Identity Chooser

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