使用JavaMail API的电子邮件主题消息

Question

How to identify that particular message is email thread and retrieving messages in that thread using JavaMail API?

for email

 A replies to B
   B replies to A
      A emails to B (Original Message)

How to fetch information about this thread?

Thank you

Answer 1

RFC 5256 describes an IMAP extension to support threading. Not a lot of servers support it, and JavaMail doesn't support it. If you need to implement the threading algorithm yourself in your application, the RFC includes some references that might be helpful.

Gmail provides a non-standard API to get the "thread ID" for a message. You can use the JavaMail gimap provider to access this information.