问题
This could be rightfully construed as a beginner's question.
Consider the following e-mail header:
MIME-Version: 1.0
My Questions:
- When should you stamp an e-mail with this header?
- When should you omit this e-mail header?
EDIT: Is it true that whenever you specify a 'Content Type' header, no matter what that content type happens to be, that you should also specify 'MIME-Version'? [This link tipped me off to the possibility.]
回答1:
According to Wikipedia, you should use the 'MIME-Version: 1.0' heading when you're sending an e-mail that contains one of the following:
- Text in character sets other than ASCII
- Non-text attachments
- Message bodies with multiple parts
- Header information in non-ASCII character sets
来源：https://stackoverflow.com/questions/3562130/e-mail-header-mime-version-1-0-when-should-this-be-used