Jon Ribbens wrote:
> On 2012-04-03, VanguardLH <V...@nguard.LH> wrote:
>> Jon Ribbens wrote:
>>> Bear in mind that that RFC is describing email messages, not news
>>> articles. Message-IDs have never been required for emails, and there
>>> is no particular technical reason that they need to be.

>> The title of the RFC is "Internet Messsage Format".  It is NOT just
>> about e-mail messaging.  It's about Internet messaging and that includes
>> newsgroups.  You will find references in RFCs for NNTP that will defer
>> to the Internet Message Format RFC.

> Yes, thanks for that egg-sucking lesson.

>> The use of Message-ID is SHOULD or RECOMMENDED, not MUST or REQUIRED,
>> for what the RFC was written for (which is a general RFC on Internet
>> messaging, not solely for e-mail or newsgroups).

> Yes, you are repeating my point back to me.

>> However, without it you don't have an indentifier with which to
>> string the messages into a threaded hierarchy.  All hell would break
>> loose in Usenet if you didn't (or your server) include the MID
>> header because Usenet would turn into that worthless flat-file
>> scheme used by web-based forums.

> Um, no, your message just would not appear or propagate since Usenet
> relies fundamentally on Message-IDs.