Hello all, I am an amateur. I am confused about the difference between Message-ID *(a field at header in MimeMessage)* and EmailId*(or MessageId, both have the same name)*.
I usually use emailId to retrieve messages *(MessageIdManager.java.getMessage)*, but when I check related MimeMessage results, I detect that the Message-ID Header has other value. So, What is the purpose of the Message-ID Header? How is it created? May somebody help me understand it? *Thank you,* *Tung, Tran Van*
