Net::IMAP::Envelope 中的发件人和发件人字段有什么区别？
如果您在此处查看 Net::IMAP::Envelope 的文档
http://www.ruby-doc.org/stdlib/libdoc/net/imap/rdoc/classes/Net/IMAP.html
该结构包含这两个字段：
from: Returns an array of Net::IMAP::Address that represents the from.
sender: Returns an array of Net::IMAP::Address that represents the sender.
之间有什么区别这两个领域，从概念上讲？
If you look at the doc for Net::IMAP::Envelope here
http://www.ruby-doc.org/stdlib/libdoc/net/imap/rdoc/classes/Net/IMAP.html
the struct includes these two fields:
from: Returns an array of Net::IMAP::Address that represents the from.
sender: Returns an array of Net::IMAP::Address that represents the sender.
What's the difference between these two fields, conceptually?
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您会看到 IMAP 从电子邮件本身解析的字段。来自维基百科的电子邮件：标题字段：
当你想回复消息时，还必须考虑 Reply-To：
该页面上有更多关于欺骗以及 MTA（服务器）试图避免和检测欺骗的讨论，但以上是信息的要点。
You're seeing fields that IMAP parsed from the email message itself. From Wikipedia's Email: Header fields:
There's also Reply-To which has to be considered when you want to reply to a message:
There is a bit more discussion on that page about spoofing and attempts by the MTA (server) to avoid and detect it, but the above is the gist of the info.