[GNC] Why do people start new threads?

[Derek Atkins]

On Mon, December 13, 2021 1:14 pm, Fred Bone wrote:
> On 13 December 2021 at 8:36, Chris Green said:
>
>> Yes, of course, if someone's mail client doesn't put the Message-ID:
>> there then there's not much one can do.  My mail client will thread
>> using the Subject: if required but it's far from the 'right' way to do
>> it.
>
> Message-ID: is one of the few required headers. If the MUA fails to
> supply it then the first MTA should do so.
>
> Threading relies on the In-Reply-To: which is supposed to contain the
> contents of Message-ID: from the message being replied to. If the MUA
> fails to create it then nothing else can.

The mailer I use on my phone (Aquamail) does not insert an In-Reply-To
header.  It's my #1 complaint of an otherwise amazing app. So yes, there
are MUAs out there that don't insert that header.  :(

> Please remember to CC this list on all your replies.
> You can do this by using Reply-To-List or Reply-All.

-derek

-- 
       Derek Atkins                 617-623-3745
       derek at ihtfp.com             www.ihtfp.com
       Computer and Internet Security Consultant