通过邮件发送非英文文本的问题
我正在尝试通过邮件发送非英文文本。非英文文本位于邮件的“发件人”字段（显示在电子邮件地址旁边的文本）。在收件人的邮箱中，非英文文本被视为一系列问号。可能出什么问题了？
以前，我在从简单的 java 程序打印非英语文本时遇到了问题。问题在于源文件使用的编码。我将其更改为 UTF-8，然后可以通过将它们嵌入到程序中来打印 unicode 文本。现在我的所有源文件都使用 UTF-8 进行编码。这是否与上述问题有任何关系？ 无论如何，我是否必须提及要发送的消息所使用的编码？如果是这样，我该怎么做？
为了更详细地说明这一点，这是在通过 google 应用引擎托管的 Web 应用程序中观察到的，并且该程序是用 java 编写的。
I am trying to send non-english text over mail. The non-english text is on the "from" field of the mail (the text that appears beside the email address). In the recipient's mailbox, the non-english text is seen as a series of question marks. What could be wrong?
Previously, I was having problems with printing non-english text from a simple java program. The problem was with encoding used for the source file. I changed it to UTF-8 and could then print unicode text by embedding them into the program. Now all my source files are encoded using UTF-8. Could this be related to the above mentioned problem in any way?
By any chance, do I have to mention the encoding to be used for the message to be sent? If so, how do I do this?
Just to put in more context, this is observed in a web application that is hosted over google app engine and the program is written in java.
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您只能在标头中发送 ASCII 文本。非 ASCII 标头必须特殊编码。
You can only send ASCII text in headers. Non-ASCII headers must be specially encoded.