[Users] Message-ID

[RW]

On Tue, 29 Jan 2013 09:46:12 +0000
Paul wrote:

> On Tue, 29 Jan 2013 09:32:56 +0100
> Andreas Meyer <anmeyer at anup.de> wrote: 
> 
> > Is the Message-ID important for the threading and
> > will it work still when the MTA creates one and not CM?
> 
> Yes and yes.

If the MTA creates the Message-Id then local copies of sent mail wont
have the header and so wont thread correctly. You can work around this
by BCCing yourself and using that copy instead.