Auto Resize Image 需要重开
Resizer for inline and attachment images (JPEG, PNG, BMP and GIF image formats).
All platforms are supported (Windows, Linux and Macintosh).
Mail Merge 需要重开
Create and Save or Send Multiple Individual and Personalized Messages from a Draft
以后发送 需要重开 精选
Signature Switch 需要重开 精选
Switch the signature on/off or choose a new one from your predefined set.
Add MEGA support to Thunderbird's Filelink feature.
ThunderPEC semplifica la gestione della Posta Elettronica Certificata (PEC) e delle comunicazioni PCT e FatturaPA in Thunderbird.
Add emojis to your e-mails.
Check and Send 需要重开
Check the message contents and addresses before you send the message...
SmartTemplate⁴ 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 can now be imported and used directly (from 2.3)
Automatic Dictionary 需要重开
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.
Send Later Button 需要重开 精选
A simple button to invoke the (already existing) send later functions.
Flex Confirm Mail 需要重开
Confirm mail address and attachments based on flexible rules.
"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.
ThunderHTMLedit 需要重开 精选
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.
Markdown Here 需要重开
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 需要重开
Adds the ability to easily insert emojis into your composed messages in Thunderbird.
Make your photos smaller, so they don't take forever to email.
Grammar Checker 需要重开 精选
Checks grammar using LanguageTool.