Message Composition

Subscribe

replyTo Requires Restart

Adds a menuitem to the Mail context Menu to Reply to a different Mailadress

Rated 4 out of 5 stars (10)
6 users

ReplyWithHeader

Outlook style headers and few goodies for Thunderbird.

Rated 4 out of 5 stars (52)
8,269 users

Resubmit Requires Restart

(Re)submit multiple messages to a predefined recipient(s)

Rated 5 out of 5 stars (3)
7 users

RM: EXTERNAL: Requires Restart

Removes 'EXTERNAL: ' from the start of an email subject if it is preceded by 'RE:' or 'FWD:' (case insensitive). The removal is done after the 'Send' button is pressed.

Not yet rated
0 users

Safe Links Cleaner

Clean up the display of links rewritten by Microsoft ATP Safe Links when reading and composing mail, so the original links can easily be viewed and copied, while retaining the rewritten addresses as the actual target of all links.

Rated 4 out of 5 stars (2)
64 users

Send Later

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

Rated 5 out of 5 stars (232)
65,588 users

SendToSecondEmail Requires Restart

This Extension lets you send Mails to both, first and second email address...

Rated 4 out of 5 stars (2)
1 user

Sensitivity Header Requires Restart

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 5 out of 5 stars (2)
73 users

Sensitivity Header + SPX Requires Restart

Implement the "Sensitivity" header for outgoing messages (described in RFC 4021 section 2.1.55).
Forked from another add-on developed by ff_bob, added SPX header for Sophos security appliances

Not yet rated
1 user

Shrunked Image Resizer

Make your photos smaller, so they don't take forever to email.

Rated 3 out of 5 stars (74)
11,420 users

Signature Switch

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

Rated 4 out of 5 stars (259)
40,532 users

Simple Mail Redirection

Allows you to resend (also known as redirect) email messages.
Uses 'cardbook' if installed

Bases on the add-on 'Mail Redirect' by Onno Ekker and Pawel Krzesniak

Please see the help page on how to use and why it sometimes does not work!

Rated 5 out of 5 stars (15)
5,533 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 (3)
295 users

Smart Quotes Requires Restart

Enables “Smart” Quotes for Thunderbird Email

Rated 4 out of 5 stars (3)
5 users

SmartTemplates Featured

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.

Rated 5 out of 5 stars (72)
8,341 users

SmilieInserter Plus Requires Restart

Insert smilies in messages.

Rated 4 out of 5 stars (25)
90 users

SMTP Switch Reborn Requires Restart

SMTP Chooser.

Rated 4 out of 5 stars (7)
64 users

StandardTexter

With the help of this Add-on, up to 99 pre-made texts (standard texts, text modules or even signatures) can be stored, which can then be retrieved and inserted when writing an e-mail.
The texts can be preformatted with HTML.

Rated 5 out of 5 stars (5)
655 users

Stationery Requires Restart

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!

Rated 4 out of 5 stars (166)
3,255 users

Stop Ignoring Reply:To Requires Restart

Default "Reply" functionality pays attention to "Reply-To" in original email

Rated 5 out of 5 stars (11)
57 users