Message Composition

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IMAP Draft Unread

This is a Thunderbird addon that lets you customize the behavior of the IMAP draft unread messages. No more new mail notifications for your drafts!!

Rated 3 out of 5 stars (1)
316 users

RemindIt No Restart

Help in reminding mails to be answer or sent again. Choose a reminder date for each received or send message that are highlighted in the message list, depending on their status (expired, soon to exprire, to be reminded). Sending a reminder is eased.

Rated 3 out of 5 stars (16)
293 users

MultiLDAP2

Based on TrustedBird/MiliMail work. Patched to work with lastest Thunderbird.
Permits to use several LDAP directories simultaneously for address autocompletion.

Not yet rated
258 users

Colored Recipient Type

Customize background-color of the recipient address fields for each recipient types of To:, Cc:, Bcc:.Customize background-color of the recipient address fields for each recipient types of To:, Cc:, Bcc:.

Not yet rated
166 users

Single Domain

Warns if you send mail from or to a specified domain. If there are multiple accounts in your profile, you can isolate one so that you can't send mail to that domain from outside or vis versa without warning.

Rated 5 out of 5 stars (1)
156 users

FastCC

A Thunderbird extension that let you switch to cc: with the ALT+CTRL+C keyboard shortcut!

Rated 5 out of 5 stars (1)
140 users

Highlight External Addresses

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.

Rated 4 out of 5 stars (1)
137 users

HtmlHighlightr

Provides source code highlighting in editor's "Insert HTML" dialog.

Rated 5 out of 5 stars (1)
119 users

Smart Quotes

Enables “Smart” Quotes for Thunderbird Email

Rated 5 out of 5 stars (2)
111 users

X-Unsent support

Adds support for the X-Unsent header.

Rated 3 out of 5 stars (2)
97 users

Patch to Alert Invalid Addresses

Shows alert if there is any invalid address in sending message.

Rated 1 out of 5 stars (1)
88 users

Lovebird

Email organized around the people you care about.

Rated 3 out of 5 stars (3)
78 users

~okeanos for Filelink

Add ~okeanos support to Thunderbird's Filelink feature.

Not yet rated
77 users

CodeHighlight

highlight code in email.

Rated 3 out of 5 stars (1)
73 users

ThunderHTMLedit

Thunderbird HTML editor. This add-on adds a HTML tab to the composition window where you can see and edit the HTML source of the message.

Not yet rated
70 users

QFO - Quick Fuck Off

This extension serves the purpose of providing instant access to the FOAAS web service. FOAAS (Fuck Off As A Service) provides a modern, RESTful, scalable solution to the common problem of telling people to fuck off.

Rated 3 out of 5 stars (3)
60 users

Posting Style Enforcer

Automatically converts top-posted messages to use bottom-positng or vice versa. Interleaved posts are left alone. Detects automatically added text and supports a per-contact list of exceptions.

Rated 5 out of 5 stars (3)
55 users

Kmaleon Extension

Con esta extensión podrás hacer una copia de tus emails en el programa kmaleon.

Not yet rated
49 users

Inbox Cleaner of expired Emails

Moves expired Emails out of your Inbox!

Not yet rated
46 users

Sensitivity Header

Implement the "Sensitivity" header for outgoing messages (described in RFC 4021 section 2.1.55).
This allows the user to select Private / Personal / Company-Confidential (or none) for an outgoing message.

Rated 4 out of 5 stars (1)
44 users