Also note that unless you're using SSL on the form that allows the user to enter the E-mail message, whatever is typed is in cleartext.
另请注意,除非您正在对允许用户输入电子邮件消息的表使用ssl,否则键入的任何内容都是明文形式的。
For Web-based E-mail like Gmail or Yahoo mail, you can use SSL (Secure Sockets Layer) encryption.
对那些像Gmail和雅虎邮的Web邮箱的用户,可以使用SSL加密(加密套接字协议层)。
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