Thunderbird is a free and open source cross-platform email client, personal information manager, news client, RSS and chat client developed by the Mozilla Foundation. The project strategy was originally modeled on the Mozilla Firefox web browser.
On January 28, 2020, the Mozilla Foundation announced that the project will henceforth be run by a new wholly owned subsidiary, MZLA Technologies, to explore offering previously unattainable products and services, collected through partnerships and non-charitable donations income.
Thunderbird 91.6 updates are as follows: System requirements: Windows: Windows 7 or later Mac: macOS 10.12 or later Linux: GTK+ 3.14 or later New features Thunderbird now provides services for sending large forwarded attachments via FileLink Fixes partial signatures Unencrypted messages show the wrong "Partially Encrypted" notification The filename of the attachment is not sanitized before saving to disk The "Import OpenPGP Key" item displayed for the public key shows an error and no encryption is imported The key "Open with" attachment dialog does not have a selected radio button option Fixed various security issues More details can be found here: https://www.thunderbird.net/en-US/thunderbird/91.6.0/releasenotes/
Thunderbird 是 Mozilla 基金会开发的一款免费开源的跨平台电子邮件客户端、个人信息管理器、新闻客户端、RSS 和聊天客户端。项目策略最初是以 Mozilla Firefox 网页浏览器为蓝本的。
2020 年 1 月 28 日，Mozilla 基金会宣布，该项目从此将由一个新的全资子公司 MZLA 技术公司负责运营，以探索提供以前无法实现的产品和服务，并通过合作关系和非慈善捐款来收集收入。
Thunderbird 91.6 更新内容如下：
系统要求：
Windows：Windows 7 或更高版本
Mac：macOS 10.12 或更高版本
Linux：GTK+ 3.14 或更高版本
新功能
Thunderbird 现在会提供通过 FileLink 发送大型转发附件的服务
修复
部分签名的未加密邮件会显示错误的 "部分加密" 通知
在保存到磁盘之前，附件的文件名没有经过清理
在附件栏中，为公钥显示的 "导入 OpenPGP 密钥" 项目显示错误，并且没有导入密钥
“打开方式" 附件对话框没有选定的单选按钮选项
各种安全问题的修复
更多详情可查看：https://www.thunderbird.net/en-US/thunderbird/91.6.0/releasenotes/
