Re: What is difference between Message-Id and EmailId ?

Thank Benoit for the fast response.
I have understood.

Cheers,
Tung

Vào Th 4, 14 thg 4, 2021 vào lúc 15:29 Tellier Benoit <[email protected]>
đã viết:

> Hello Tung!
>
> Thanks for asking!
>
> The Mime Message-Id header is defined in RFC-822. You can more or less
> relate it with the content of a message.
>
> The EmailId is defined in RFC-8621. It identifies a unique email in
> somebody mailbox.
>
> Now consider:
>
> Bob sends a Message to Alice. That Message (as per RFC-822) will
> correspond to two emails with the same content (one in Bob Sent mailbox,
> one in Alice INBOX), so with the same Message-Id header, but two
> distinct emailId.
>
> Also the usages are different.
>
> Message-Id is useful to relates messages to each other (A is a reply to
> B, a forward) and can be used to form email threads. In your context
> (Message Delivery Notification) it allows to know for which message a
> given MDN is issued.
>
> EmailId designate a single email in somebody mailbox, and I can use it
> to delete the email, update its flags, move it to another mailbox.
>
> https://jmap.io/spec-mail.html#emails
>
> > id: Id (immutable; server-set) The id of the Email object. Note
> > that this is the JMAP object id, NOT the Message-ID header field
> > value of the message [@!RFC5322].
>
> The message-id field needs to be specified while generating emails. I am
> unsure here but javax.mail / mime4j should set one if none is specified.
>
> Last but not least: this is a rather technical discussion, more related
> to James development, but maybe not relevant for James users. As such I
> believe next time we want to discuss technical details related to James
> development (which is great!) we should do it on server-dev.
>
> Cheers,
>
> Benoit
>
> Le 14/04/2021 à 15:12, Tung Tran Van a écrit :
> > 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*
> >
>
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Tung, Tran Van
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