以后发送 需要重开 精选
Mail Merge 需要重开
Create and Save or Send Multiple Individual and Personalized Messages from a Draft
Signature Switch 需要重开 精选
Switch the signature on/off or choose a new one from your predefined set.
ThunderPEC semplifica la gestione della Posta Elettronica Certificata (PEC) e delle comunicazioni PCT e FatturaPA in Thunderbird.
Allows you to use your Exchange email accounts that use Outlook Web Access (OWA) with Thunderbird
Flex Confirm Mail 需要重开
Confirm mail address and attachments based on flexible rules.
Check and Send 需要重开
Check the message contents and addresses before you send the message...
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).
Add emojis to your e-mails.
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)
Quickly highlight some text in Thunderbird message composing windows.
Send Later Button 需要重开 精选
A simple button to invoke the (already existing) send later functions.
Make your photos smaller, so they don't take forever to 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.
"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.
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.
Outlook style headers and few goodies for Thunderbird & Postbox.
Grammar Checker 需要重开 精选
Checks grammar using LanguageTool.
Category manager for Thunderbird contacts, also allows to send an email to all members of a category (categories can be used as contact groups).