Does gmail preserve x-headers in email replies? I m developing an application which threads emails and email replies together using a Thread Id.
I add the header through SMTP .net library with the thread id, using the key X-ThreadId.
If I send it to a gmail account, I can see the header in there in the email source. However if I then reply to it, I want that header to be sent in the reply. It seems to drop that particular header.
答复电子邮件中是否有mail头信息? 电子邮件是否是一个一般性问题? 如果是的话,我如何处理这个问题?