Hi Ken, > > > 4) Some people, for reasons I would classify as "vague", prefer to > > > generate their Message-IDs locally so their saved copy of the > > > message has the Message-ID in it. > > > > The reason you state seems precise rather than vague. > > I mean, that's not a reason in my thinking? Like, WHY do people want > that?
To be able to uniquely refer to that email in future by knowing what the message-id field contains. The reference may be to oneself or to other recipients. That is the purpose of the field. Not knowing the field's value lessens its worth to tracing the flow through downstream parties in log files. It's a lot easier to give the unique message ID than a combination of date, subject, and a bit of a description about the body's content and then have others have to search. -- Cheers, Ralph.