Message Composition

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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)
9 weekly downloads

Get before Send

Get messages for the account which is bound to the identity then send the message when you click the toolbar button or the menu item. If your SMTP sever authenticates using POP(IMAP) before SMTP, the extension is useful.

Rated 5 out of 5 stars (2)
8 weekly downloads

CodeHighlight

highlight code in email.

Rated 3 out of 5 stars (1)
6 weekly downloads

FastCC

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

Rated 5 out of 5 stars (1)
6 weekly downloads

random(signature)

Updates a given signature file in regular intervals.

Rated 4 out of 5 stars (55)
6 weekly downloads

Smart Quotes

Enables “Smart” Quotes for Thunderbird Email

Rated 5 out of 5 stars (2)
5 weekly downloads

~okeanos for Filelink

Add ~okeanos support to Thunderbird's Filelink feature.

Not yet rated
5 weekly downloads

Resubmit

Re-submit messages received from users to a predefined recipient(s)

Not yet rated
3 weekly downloads

PennyPost

This extension makes it very easy to generate and attach stamps to outgoing mail. It also automatically detects and verifies stamps on incoming emails. The MBound algorithm requires a 16MB fixed table to work, HashCash is more CPU intense.

Rated 5 out of 5 stars (2)
3 weekly downloads

MALA Hindi Spell Checker by MCRPV, (Anurag Seetha)

MALA (Makhanlal) Hindi Shabd Shodhak to check Spelling of Hindi Unicode Text by Makhanlal Chaturvedi National University of Journalism & Communication, Bhopal, India. Chief Developer - Dr. Anurag Seetha. The program is Released Under the GNU GPL V 3

Not yet rated
3 weekly downloads

Lovebird

Email organized around the people you care about.

Rated 3 out of 5 stars (3)
3 weekly downloads

X-Unsent support

Adds support for the X-Unsent header.

Rated 5 out of 5 stars (1)
2 weekly downloads

Inbox Cleaner of expired Emails

Moves expired Emails out of your Inbox!

Not yet rated
2 weekly downloads

Kmaleon Extension

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

Not yet rated
2 weekly downloads

Ethical signature

Add a button to the email composition toolbar, which lets you insert an ethical signature.

Not yet rated
2 weekly downloads

nomapi

not a mapi plugin

Not yet rated
2 weekly downloads

Patch to Alert Invalid Addresses

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

Rated 1 out of 5 stars (1)
2 weekly downloads

forcebutton

This add-on can resend mails, so you "force" the other side to answer. It could be useful at corporate environment.

Rated 2 out of 5 stars (1)
2 weekly downloads

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)
1 weekly download

Rage Hoye

Prevents you from sending offensive mails based on a keyword list

Not yet rated
0 weekly downloads