You are viewing a plain text version of this content. The canonical link for it is here.
Posted to server-user@james.apache.org by Tung Tran Van <tu...@gmail.com> on 2021/04/14 08:12:49 UTC
What is difference between Message-Id and EmailId ?
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*
Re: What is difference between Message-Id and EmailId ?
Posted by Tung Tran Van <tu...@gmail.com>.
Thank Benoit for the fast response.
I have understood.
Cheers,
Tung
Vào Th 4, 14 thg 4, 2021 vào lúc 15:29 Tellier Benoit <bt...@apache.org>
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*
> >
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: server-user-unsubscribe@james.apache.org
> For additional commands, e-mail: server-user-help@james.apache.org
>
>
--
Tung, Tran Van
*Phone:* (+84) 35 757 6258
*Skype:* tung.tv202
Re: What is difference between Message-Id and EmailId ?
Posted by Tellier Benoit <bt...@apache.org>.
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*
>
---------------------------------------------------------------------
To unsubscribe, e-mail: server-user-unsubscribe@james.apache.org
For additional commands, e-mail: server-user-help@james.apache.org
Re: What is difference between Message-Id and EmailId ?
Posted by David Matthews <ma...@dmatthews.org.INVALID>.
>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.
>
No, no Benoit!
It was great to read that lucid explanation here :-)
--
David Matthews
mail@dmatthews.org
---------------------------------------------------------------------
To unsubscribe, e-mail: server-user-unsubscribe@james.apache.org
For additional commands, e-mail: server-user-help@james.apache.org