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Provider for Google Calendar

Provider for Google Calendar connects Thunderbird with Google Calendar for full task sync, conference details, and scheduling support. It offers deeper integration than Thunderbird’s native support using Google’s official API.

Rated 3 out of 5 stars (1,725)
175,013 users

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British English Dictionary (Marco Pinto)

A fork of Mark Tyndall's add-on, based on David Bartlett's
British Dictionary R1.19 for Firefox, Thunderbird and SeaMonkey.

Rated 5 out of 5 stars (83)
161,522 users

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English United States Dictionary

English United States (en-US) Dictionary as shipped with Thunderbird 115 ESR and Firefox 115 ESR.

Rated 4 out of 5 stars (39)
62,366 users

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French spelling dictionary

Spelling dictionary for the French language.

Rated 4 out of 5 stars (53)
112,492 users

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German Dictionary

German Dictionary (new Orthography) for spellchecking in Mozilla products

Rated 4 out of 5 stars (83)
238,186 users

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Spanish (Spain) Dictionary

Spanish/Spain Dictionary

Rated 4 out of 5 stars (167)
60,791 users

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CardBook Featured

A new Thunderbird address book based on the CardDAV and vCard standards.

Twitter: @CardBookAddon

Rated 4 out of 5 stars (490)
66,129 users

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ExQuilla for Exchange

Thunderbird email accounts connecting to Microsoft Exchange Web Services.

Rated 4 out of 5 stars (134)
4,136 users

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Brazilian Portuguese Dictionary (New Spelling)

The same spellchecker shipped with the Brazilian version of Firefox.

Rated 4 out of 5 stars (46)
7,741 users

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Mail Merge

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

Rated 5 out of 5 stars (236)
74,789 users

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LookOut (fix version)

LookOut decodes winmail.dat (TNEF encoded) files that may come from a misconfigured Microsoft Exchange server or Outlook user allowing access to the original attachments
Support: Thunderbird

Rated 4 out of 5 stars (101)
178,272 users

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DKIM Verifier Featured

Verifies the DKIM-Signature of an e-mail.

Rated 4 out of 5 stars (52)
25,278 users

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German dictionary (de_DE)

German dictionary igerman98 (de_DE, Germany), for Firefox, Thunderbird und Seamonkey.

Rated 4 out of 5 stars (24)
38,259 users

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Dizionario italiano

Add support for Italian to spellchecking

Rated 4 out of 5 stars (71)
83,225 users

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Send Later

True "Send Later" functionality to schedule the time for sending an email.

Rated 5 out of 5 stars (267)
116,589 users

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Remove Duplicate Messages

Search and remove messages which are the same as other messages in your mail folders (referred to as duplicates or dupes).

Rated 4 out of 5 stars (312)
98,819 users

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Polish Spellchecker Dictionary

Polish spell-check dictionary for Firefox, Thunderbird and SeaMonkey.

Rated 5 out of 5 stars (50)
47,768 users

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Woordenboek Nederlands

Dutch dictionary with wordslist from OpenTaal.

Rated 3 out of 5 stars (70)
22,980 users

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Russian spellchecking dictionary

Russian spellchecking dictionary

Rated 4 out of 5 stars (136)
15,202 users

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Verificador Ortográfico para Português do Brasil

Possui a maioria das palavras existentes em português do Brasil, de acordo com o novo acordo ortográfico que entrou em vigor janeiro de 2009. É Atualizado constantemente.

Precisa de ajuda?
facebook.com/RescueLanguage
rescuelanguage.sf.net

Rated 5 out of 5 stars (76)
6,051 users

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