FossaMail抱歉，我无法处理这个输入，因为它没有提供足够的信息去翻译成中文。如果您有任何具体的句子或问题需要翻译，请随时告诉我。是一个开源的、基于Mozilla Thunderbird的邮件，抱歉，你没有提供需要翻译的内容。如果有要翻译的句子，请告诉我。适用于Windows的新闻和聊天客户端抱歉，我没有收到任何翻译请求。请您重新输入需要翻译的句子。由Pale Moon开发者带来的Linux版本（因此与Mozilla公司无关）。它是Mozilla Thunderbird邮件和新闻客户端的替代版本，并基于Pale Moon浏览器核心。

FossaMail 功能：

• This is a security and maintenance update, updating the platform code to Pale Moon 27.2.1.
• Please see Pale Moon's release notes for details on the updates involved.
• Important note: If you have previously changed the configuration to enable deprecated/vulnerable cipher suites to connect to old mail servers (you really should upgrade those where possible; e-mail by design is private so secure encryption is very important!) then you will most likely need an additional step:
• In Options, go to Advanced, open the Config Editor, find security.tls.insecure_fallback_hosts and add your insecure host(s) to it (comma-separated). This is needed for RC4 and 3DES.